{"id":10036,"date":"2022-10-24T16:39:28","date_gmt":"2022-10-24T09:39:28","guid":{"rendered":"https:\/\/vinatom.gov.vn\/?p=10036"},"modified":"2022-10-24T16:39:28","modified_gmt":"2022-10-24T09:39:28","slug":"nghien-cuu-toi-uu-thay-dao-nhien-lieu-lo-phan-ung-hat-nhan-vver-1000","status":"publish","type":"post","link":"https:\/\/vinatom.gov.vn\/nghien-cuu-toi-uu-thay-dao-nhien-lieu-lo-phan-ung-hat-nhan-vver-1000\/","title":{"rendered":"Nghi\u00ean c\u1ee9u t\u1ed1i \u01b0u thay \u0111\u1ea3o nhi\u00ean li\u1ec7u  l\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n vver-1000"},"content":{"rendered":"<p><strong>V\u1ea5n<\/strong><strong> \u0111\u1ec1 q<\/strong><strong>u\u1ea3n<\/strong><strong> l\u00fd nhi\u00ean<\/strong><strong> li\u1ec7u<\/strong><strong> trong v\u00f9ng ho\u1ea1t <\/strong><\/p>\n<p style=\"text-align: justify\">Qu\u1ea3n l\u00fd nhi\u00ean li\u1ec7u trong v\u00f9ng ho\u1ea1t (In-core Fuel Management &#8211; ICFM), c\u1ee5 th\u1ec3 l\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i nhi\u00ean li\u1ec7u, l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 quan tr\u1ecdng trong vi\u1ec7c thi\u1ebft k\u1ebf v\u00f9ng ho\u1ea1t l\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n v\u00e0 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n sau m\u1ed7i chu k\u1ef3 nhi\u00ean li\u1ec7u \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c l\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n. C\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i nhi\u00ean li\u1ec7u l\u00e0 s\u1ef1 s\u1eafp x\u1ebfp c\u1ee7a c\u00e1c b\u00f3 nhi\u00ean li\u1ec7u trong v\u00f9ng ho\u1ea1t l\u00f2 ph\u1ea3n \u1ee9ng. Nhi\u1ec7m v\u1ee5 ch\u00ednh c\u1ee7a ICFM l\u00e0 x\u00e1c \u0111\u1ecbnh c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i nhi\u00ean li\u1ec7u t\u1ed1i \u01b0u. S\u1ef1 s\u1eafp x\u1ebfp t\u1ed1i \u01b0u c\u00f3 th\u1ec3 mang l\u1ea1i hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng nhi\u00ean li\u1ec7u t\u1ed1t nh\u1ea5t, cho t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u1ea1o ra trong m\u1ed9t chu tr\u00ecnh l\u00e0 t\u1ed1i \u0111a m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o y\u00eau c\u1ea7u an to\u00e0n. Trong v\u00f9ng ho\u1ea1t l\u00f2 ph\u1ea3n \u1ee9ng, c\u00f3 nhi\u1ec1u lo\u1ea1i b\u00f3 h\u1ee3p nhi\u00ean li\u1ec7u v\u1edbi c\u00e1c m\u1ee9c \u0111\u1ed9 l\u00e0m gi\u00e0u v\u00e0 \u0111\u1ed9 s\u00e2u ch\u00e1y kh\u00e1c nhau. Do \u0111\u00f3, v\u1ea5n \u0111\u1ec1 t\u1ed1i \u01b0u h\u00f3a c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ee9c t\u1ea1p v\u1edbi m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u00e1c c\u1ea5u h\u00ecnh c\u00f3 th\u1ec3 x\u1ea3y ra. Nghi\u00ean c\u1ee9u n\u00e0y t\u1eadp trung v\u00e0o vi\u1ec7c nghi\u00ean c\u1ee9u v\u00e0 \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ti\u00ean ti\u1ebfn \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i nhi\u00ean li\u1ec7u c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000, l\u00e0 c\u00f4ng ngh\u1ec7 PWR c\u1ee7a Nga, \u0111\u00e3 \u0111\u01b0\u1ee3c xem x\u00e9t \u0111\u01b0a v\u00e0o ch\u01b0\u01a1ng tr\u00ecnh \u0111i\u1ec7n h\u1ea1t nh\u00e2n c\u1ee7a Vi\u1ec7t Nam tr\u01b0\u1edbc n\u0103m 2016.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">V\u1ea5n \u0111\u1ec1 c\u1ee7a b\u00e0i to\u00e1n ICFM l\u00e0 kh\u00f4ng gian t\u00ecm ki\u1ebfm qu\u00e1 l\u1edbn (B\u1ea3ng 1), v\u00ec v\u1eady cho \u0111\u1ebfn nay ch\u01b0a c\u00f3 thu\u1eadt to\u00e1n t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u n\u00e0o c\u00f3 th\u1ec3 x\u00e1c nh\u1eadn r\u1eb1ng nghi\u1ec7m t\u00ecm \u0111\u01b0\u1ee3c cu\u1ed1i c\u00f9ng l\u00e0 nghi\u1ec7m t\u1ed1i \u01b0u to\u00e0n c\u1ee5c. Do \u0111\u00f3, c\u00e1c nghi\u00ean c\u1ee9u t\u1ed1i \u01b0u h\u00f3a hi\u1ec7n nay t\u1eadp trung v\u00e0o vi\u1ec7c c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 h\u1ed9i t\u1ee5 c\u1ee7a qu\u00e1 tr\u00ecnh t\u00ecm ki\u1ebfm nh\u1eb1m t\u00ecm ra c\u00e1c nghi\u1ec7m ng\u00e0y c\u00e0ng t\u1ed1t h\u01a1n v\u1edbi c\u00f9ng s\u1ed1 ph\u00e9p. Nghi\u00ean c\u1ee9u n\u00e0y s\u1ebd th\u1ef1c hi\u1ec7n t\u00ecm hi\u1ec3u, c\u1ea3i ti\u1ebfn v\u00e0 \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u ti\u00ean ti\u1ebfn \u0111\u1ec3 n\u00e2ng cao t\u1ed1c \u0111\u1ed9 h\u1ed9i t\u1ee5 trong vi\u1ec7c gi\u1ea3i b\u00e0i to\u00e1n t\u1ed1i \u01b0u thay \u0111\u1ea3o nhi\u00ean li\u1ec7u v\u00e0 hai m\u1ee5c ti\u00eau ch\u00ednh:<\/p>\n<ol>\n<li>Nghi\u00ean c\u1ee9u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u ti\u00ean ti\u1ebfn \u0111\u1ec3 \u00e1p d\u1ee5ng cho b\u00e0i to\u00e1n t\u1ed1i \u01b0u LP c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n.<\/li>\n<li>Ph\u00e1t tri\u1ec3n m\u1ed9t c\u00f4ng c\u1ee5 t\u00ednh to\u00e1n \u0111\u1ec3 t\u00ecm ki\u1ebfm c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i t\u1ed1i \u01b0u cho l\u00f2 ph\u1ea3n \u1ee9ng VVER.<\/li>\n<\/ol>\n<p>B\u1ea3ng 1. \u01af\u1edbc l\u01b0\u1ee3ng s\u1ed1 c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i v\u00e0 th\u1eddi gian t\u00ednh to\u00e1n t\u1ea5t c\u1ea3 c\u1ea5u h\u00ecnh \u0111\u1ed1i v\u1edbi l\u00f2 VVER-1000 n\u1ea1p t\u1ea3i nhi\u00ean li\u1ec7u MOX<\/p>\n<table width=\"512\">\n<tbody>\n<tr>\n<td width=\"252\">\u0110i\u1ec1u ki\u1ec7n r\u00e0ng bu\u1ed9c<\/td>\n<td width=\"104\">S\u1ed1 c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i<\/td>\n<td width=\"156\">\u01af\u1edbc l\u01b0\u1ee3ng th\u1eddi gian t\u00ednh to\u00e1n* (n\u0103m)<\/td>\n<\/tr>\n<tr>\n<td width=\"252\">Kh\u00f4ng x\u00e9t t\u00ednh \u0111\u1ed1i x\u1ee9ng, kh\u00f4ng x\u00e9t s\u1ef1 gi\u1ed1ng nhau c\u1ee7a c\u00e1c b\u00f3 nhi\u00ean li\u1ec7u<\/td>\n<td width=\"104\">1.20E+289<\/td>\n<td width=\"156\">3.90E+280<\/td>\n<\/tr>\n<tr>\n<td width=\"252\">Kh\u00f4ng x\u00e9t t\u00ednh \u0111\u1ed1i x\u1ee9ng, c\u00f3 x\u00e9t s\u1ef1 gi\u1ed1ng nhau c\u1ee7a c\u00e1c b\u00f3 nhi\u00ean li\u1ec7u<\/td>\n<td width=\"104\">3.90E+128<\/td>\n<td width=\"156\">1.20E+120<\/td>\n<\/tr>\n<tr>\n<td width=\"252\">\u0110\u1ed1i x\u1ee9ng 1\/6, kh\u00f4ng x\u00e9t s\u1ef1 gi\u1ed1ng nhau c\u1ee7a c\u00e1c b\u00f3 nhi\u00ean li\u1ec7u<\/td>\n<td width=\"104\">1.10E+28<\/td>\n<td width=\"156\">3.50E+19<\/td>\n<\/tr>\n<tr>\n<td width=\"252\">\u0110\u1ed1i x\u1ee9ng 1\/6, c\u00f3 x\u00e9t s\u1ef1 gi\u1ed1ng nhau c\u1ee7a c\u00e1c b\u00f3 nhi\u00ean li\u1ec7u<\/td>\n<td width=\"104\">4.90E+18<\/td>\n<td width=\"156\">1.50E+10<\/td>\n<\/tr>\n<tr>\n<td colspan=\"3\" width=\"512\">*: Gi\u1ea3 thi\u1ebft t\u1ed1c \u0111\u1ed9 t\u00ednh to\u00e1n l\u00e0 10 c\u1ea5u h\u00ecnh\/gi\u00e2y<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u00a0<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Ph\u00e1t<\/strong><strong> tri\u1ec3n c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh m\u00f4 ph\u1ecfng v\u00e0 ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u v\u00f9ng ho\u1ea1t l\u00f2 ph\u1ea3n \u1ee9ng VVER 1000 <\/strong><\/p>\n<p><strong><em>Ph\u00e1t tri\u1ec3n v\u00e0 ki\u1ec3m ch\u1ee9ng ch\u01b0\u01a1ng tr\u00ecnh LPO-V: <\/em><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">Ch\u01b0\u01a1ng tr\u00ecnh m\u00f4 ph\u1ecfng v\u00f9ng ho\u1ea1t (LPO-V) \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n cho c\u00e1c l\u00f2 ph\u1ea3n \u1ee9ng VVER, c\u00f9ng v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u h\u00f3a. Ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y gi\u1ea3i c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh khu\u1ebfch t\u00e1n trong \u00f4 m\u1ea1ng tam gi\u00e1c d\u1ef1a tr\u00ean ph\u01b0\u01a1ng ph\u00e1p sai ph\u00e2n h\u1eefu h\u1ea1n. Vi\u1ec7c x\u00e1c minh ch\u01b0\u01a1ng tr\u00ecnh LPO-V \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u1ef1a tr\u00ean m\u1ed9t b\u00e0i to\u00e1n chu\u1ea9n c\u1ee7a l\u00f2 VVER-1000 n\u1ea1p t\u1ea3i nhi\u00ean li\u1ec7u MOX.<\/p>\n<p style=\"text-align: justify\">H\u00ecnh 1 hi\u1ec3n th\u1ecb m\u00f4 h\u00ecnh 1\/6 v\u00f9ng ho\u1ea1t VVER-1000 MOX v\u1edbi 24 \u00f4 m\u1ea1ng tam gi\u00e1c tr\u00ean m\u1ed7i b\u00f3 nhi\u00ean li\u1ec7u trong ch\u01b0\u01a1ng tr\u00ecnh LPO-V. B\u1ed9 ti\u1ebft di\u1ec7n v\u0129 m\u00f4 b\u1ed1n nh\u00f3m c\u1ee7a b\u00f3 nhi\u00ean li\u1ec7u \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb t\u1eeb c\u00e1c t\u00ednh to\u00e1n \u00f4 m\u1ea1ng b\u1eb1ng m\u00f4-\u0111un PIJ c\u1ee7a h\u1ec7 ch\u01b0\u01a1ng tr\u00ecnh SRAC2006 v\u00e0 th\u01b0 vi\u1ec7n d\u1eef li\u1ec7u ENDF\/B-VII.0.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10037\" src=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2022\/10\/PH\u00da-1.png\" alt=\"\" width=\"1922\" height=\"1092\" \/><\/p>\n<p style=\"text-align: center\">H\u00ecnh 1. M\u00f4 h\u00ecnh v\u00f9ng ho\u1ea1t VVER-1000 v\u1edbi 24 \u00f4 m\u1ea1ng tam gi\u00e1c tr\u00eam m\u1ed7i b\u00f3 nhi\u00ean li\u1ec7u trong ch\u01b0\u01a1ng tr\u00ecnh LPO-V<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">T\u00ednh to\u00e1n ki\u1ec3m tra m\u00f4-\u0111un m\u00f4 ph\u1ecfng v\u00f9ng ho\u1ea1t c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh LPO-V \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh d\u1ef1a tr\u00ean c\u1ea5u h\u00ecnh tham chi\u1ebfu c\u1ee7a b\u00e0i to\u00e1n chu\u1ea9n l\u00f2 VVER-1000 MOX. B\u1ea3ng 2 so s\u00e1nh c\u00e1c gi\u00e1 tr\u1ecb k_eff thu \u0111\u01b0\u1ee3c t\u1eeb ch\u01b0\u01a1ng tr\u00ecnh LPO-V v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb t\u1eeb MCNP4c \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong b\u00e0i to\u00e1n chu\u1ea9n. K\u1ebft qu\u1ea3 so s\u00e1nh cho th\u1ea5y hai ch\u01b0\u01a1ng tr\u00ecnh c\u00f3 s\u1ef1 th\u1ed1ng nh\u1ea5t t\u1ed1t trong m\u00f4 ph\u1ecfng v\u00f9ng ho\u1ea1t VVER-1000 MOX.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10044\" src=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2022\/10\/b\u1ea3ng-2.png\" alt=\"\" width=\"1323\" height=\"359\" \/><\/p>\n<p style=\"text-align: center\">B\u1ea3ng 2. So s\u00e1nh gi\u00e1 tr\u1ecb k_eff \u0111\u01b0\u1ee3c t\u00ednh b\u1edfi LPO-V v\u00e0 MCNP4c cho n\u0103m tr\u1ea1ng th\u00e1i (S1&#8211;S5) c\u1ee7a b\u00e0i to\u00e1n chu\u1ea9n l\u00f2 VVER-1000 MOX<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">Vi\u1ec7c ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 t\u00ednh to\u00e1n c\u0169ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch so s\u00e1nh gi\u1eefa LPO-V v\u00e0 m\u00f4-\u0111un CITATION c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh SRAC2006. Th\u1eddi gian t\u00ednh to\u00e1n 2000 c\u1ea5u h\u00ecnh l\u00f2 VVER-1000 MOX b\u1eb1ng LPO-V l\u00e0 kho\u1ea3ng 340 gi\u00e2y, nhanh h\u01a1n kho\u1ea3ng 3 l\u1ea7n so v\u1edbi m\u00f4-\u0111un CITATION c\u1ee7a SRAC2006 (1040 gi\u00e2y) v\u1edbi c\u00f9ng \u0111i\u1ec1u ki\u1ec7n t\u00ednh to\u00e1n. Nh\u01b0 v\u1eady, m\u00f4-\u0111un m\u00f4 ph\u1ecfng v\u00f9ng ho\u1ea1t c\u1ee7a LPO-V ph\u00f9 h\u1ee3p v\u1edbi b\u00e0i to\u00e1n t\u1ed1i \u01b0u LP v\u1edbi s\u1ed1 l\u01b0\u1ee3ng c\u1ea5u h\u00ecnh c\u1ea7n t\u00ednh to\u00e1n l\u1edbn.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><em>Nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u:<\/em><\/strong><\/p>\n<p style=\"text-align: justify\"><strong><em>\u00a0<\/em><\/strong>Hai ph\u01b0\u01a1ng ph\u00e1p t\u1ed1i \u01b0u h\u00f3a ti\u00ean ti\u1ebfn \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n cho b\u00e0i to\u00e1n t\u1ed1i \u01b0u n\u1ea1p t\u1ea3i nhi\u00ean li\u1ec7u c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000: Ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng t\u00f4i kim ti\u1ebfn h\u00f3a (ESA) v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfn h\u00f3a vi ph\u00e2n d\u1ef1a tr\u00ean l\u1ecbch s\u1eed th\u00e0nh c\u00f4ng (SHADE). Ph\u01b0\u01a1ng ph\u00e1p ESA \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn t\u1eeb ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng t\u00f4i kim nguy\u00ean b\u1ea3n (SA) b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c to\u00e1n t\u1eed trao \u0111\u1ed5i ch\u00e9o v\u00e0 \u0111\u1ed9t bi\u1ebfn \u0111\u1ec3 t\u1ea1o ra c\u00e1c c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i th\u1eed nghi\u1ec7m m\u1edbi. Ph\u01b0\u01a1ng ph\u00e1p SHADE s\u1eed d\u1ee5ng c\u01a1 ch\u1ebf th\u00edch \u1ee9ng d\u1ef1a tr\u00ean l\u1ecbch s\u1eed c\u1ee7a c\u00e1c tham s\u1ed1 \u0111i\u1ec1u khi\u1ec3n th\u00e0nh c\u00f4ng, t\u1ee9c l\u00e0 t\u1ef7 l\u1ec7 \u0111\u1ed9t bi\u1ebfn F v\u00e0 t\u1ef7 l\u1ec7 trao \u0111\u1ed5i ch\u00e9o CR, \u0111\u1ec3 c\u1ea3i thi\u1ec7n thu\u1eadt to\u00e1n ti\u1ebfn h\u00f3a vi ph\u00e2n (DE) ban \u0111\u1ea7u. Do \u0111\u00f3, thay v\u00ec ba tham s\u1ed1 \u0111i\u1ec1u khi\u1ec3n trong DE ban \u0111\u1ea7u, ph\u01b0\u01a1ng ph\u00e1p SHADE bao g\u1ed3m hai tham s\u1ed1 l\u00e0 k\u00edch th\u01b0\u1edbc qu\u1ea7n th\u1ec3 NP v\u00e0 k\u00edch th\u01b0\u1edbc b\u1ed9 nh\u1edb l\u1ecbch s\u1eed H. \u0110\u1ec3 \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p SHADE cho b\u00e0i to\u00e1n t\u1ed1i \u01b0u thay \u0111\u1ea3o nhi\u00ean li\u1ec7u, ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn ch\u1ec9 s\u1ed1 v\u1ecb tr\u00ed t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u00e3 \u0111\u01b0\u1ee3c tri\u1ec3n khai \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i c\u00e1c bi\u1ebfn th\u1ef1c th\u00e0nh c\u00e1c bi\u1ebfn s\u1ed1 nguy\u00ean. C\u00e1c t\u00ednh to\u00e1n \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 ch\u1ecdn c\u00e1c th\u00f4ng s\u1ed1 \u0111i\u1ec1u khi\u1ec3n ph\u00f9 h\u1ee3p c\u1ee7a SHADE cho b\u00e0i to\u00e1n t\u1ed1i \u01b0u thay \u0111\u1ea3o nhi\u00ean li\u1ec7u c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000 n\u1ea1p t\u1ea3i MOX.<\/p>\n<p style=\"text-align: justify\">C\u00e1c t\u00ednh to\u00e1n s\u1ed1 cho b\u00e0i to\u00e1n t\u1ed1i \u01b0u thay \u0111\u1ea3o nhi\u00ean li\u1ec7u c\u1ee7a l\u00f2 VVER-1000 n\u1ea1p t\u1ea3i MOX \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ESA v\u00e0 SHADE, c\u00f3 so s\u00e1nh v\u1edbi SA, m\u00f4 ph\u1ecfng t\u00f4i kim th\u00edch \u1ee9ng (ASA) v\u00e0 DE. Hai h\u00e0m m\u1ee5c ti\u00eau \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u0169ng nh\u01b0 t\u00ecm c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u cho l\u00f2 VVER:<\/p>\n<p style=\"text-align: justify\">Trong \u0111\u00f3, h\u00e0m m\u1ee5c ti\u00eau F2 \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a h\u1ec7 s\u1ed1 nh\u00e2n neutron hi\u1ec7u d\u1ee5ng (k<sub>eff<\/sub>), \u0111\u1ed3ng th\u1eddi l\u00e0m ph\u1eb3ng ph\u00e2n b\u1ed1 c\u00f4ng su\u1ea5t h\u01b0\u1edbng t\u00e2m.<\/p>\n<p style=\"text-align: justify\">\u0110\u1ec3 so s\u00e1nh hi\u1ec7u su\u1ea5t c\u1ee7a SA, ASA v\u00e0 ESA, qu\u00e1 tr\u00ecnh t\u00ecm ki\u1ebfm c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i s\u1eed d\u1ee5ng ba ph\u01b0\u01a1ng ph\u00e1p n\u00e0y tr\u01b0\u1edbc ti\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi h\u00e0m m\u1ee5c ti\u00eau $F1$ \u0111\u1ec3 t\u00e1i t\u1ea1o c\u1ea5u h\u00ecnh tham chi\u1ebfu. K\u1ebft qu\u1ea3 trung b\u00ecnh c\u1ee7a 50 l\u1ea7n ch\u1ea1y \u0111\u1ed9c l\u1eadp \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong B\u1ea3ng 3. K\u1ebft qu\u1ea3 n\u00e0y cho th\u1ea5y hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n c\u1ee7a ESA trong vi\u1ec7c t\u00e1i t\u1ea1o c\u1ea5u h\u00ecnh tham chi\u1ebfu so v\u1edbi SA v\u00e0 ASA.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10045\" src=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2022\/10\/b\u1ea3ng-3.png\" alt=\"\" width=\"805\" height=\"258\" \/><\/p>\n<p style=\"text-align: center\">B\u1ea3ng 3. So s\u00e1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p SA, ASA v\u00e0 ESA v\u1edbi h\u00e0m m\u1ee5c ti\u00eau F1<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">B\u1ea3ng 4 l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p SA, ASA v\u00e0 ESA v\u1edbi h\u00e0m m\u1ee5c ti\u00eau $F2$. C\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng c\u00e1c gi\u00e1 tr\u1ecb $F2$ c\u1ee7a ESA l\u1edbn h\u01a1n c\u1ee7a SA v\u00e0 ASA v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n nh\u1ecf h\u01a1n, \u0111\u1ed3ng th\u1eddi s\u1ed1 l\u01b0\u1ee3ng LP \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n trong ESA nh\u1ecf h\u01a1n SA v\u00e0 ASA kho\u1ea3ng 5-10 \\% trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p. C\u00e1c k\u1ebft qu\u1ea3 cho th\u1ea5y c\u00e1c c\u1ea5u h\u00ecnh th\u1eed nghi\u1ec7m m\u1edbi th\u00f4ng qua to\u00e1n t\u1eed trao \u0111\u1ed5i ch\u00e9o v\u00e0 \u0111\u1ed9t bi\u1ebfn c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p ESA trong b\u00e0i to\u00e1n t\u1ed1i \u01b0u LP c\u1ee7a l\u00f2 VVER-1000.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10046\" src=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2022\/10\/b\u1ea3ng-4.png\" alt=\"\" width=\"1021\" height=\"190\" \/><\/p>\n<p style=\"text-align: center\">B\u1ea3ng 4. So s\u00e1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p SA, ASA v\u00e0 ESA v\u1edbi h\u00e0m m\u1ee5c ti\u00eau F2<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">V\u1edbi ph\u01b0\u01a1ng ph\u00e1p SHADE, T\u00ednh to\u00e1n kh\u1ea3o s\u00e1t \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c tham s\u1ed1 \u0111i\u1ec1u khi\u1ec3n NP v\u00e0 H, trong \u0111\u00f3 NP thay \u0111\u1ed5i t\u1eeb 10 \u0111\u1ebfn 50 v\u1edbi b\u01b0\u1edbc 5 v\u00e0 H thay \u0111\u1ed5i t\u1eeb 2 \u0111\u1ebfn 10. H\u00ecnh 2 cho th\u1ea5y s\u1ef1 ph\u1ee5 thu\u1ed9c c\u1ee7a OF c\u1ee7a c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u theo NP v\u00e0 H. Gi\u00e1 tr\u1ecb ph\u00f9 h\u1ee3p c\u1ee7a NP v\u00e0 H \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn t\u1ea1i \u0111i\u1ec3m m\u00e0 OF \u0111\u1ea1t gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t. T\u1eeb H\u00ecnh 2, c\u00e1c gi\u00e1 tr\u1ecb NP = 20 v\u00e0 H = 6 \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn cho c\u00e1c t\u00ednh to\u00e1n t\u1ed1i \u01b0u LP b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p SHADE.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-10038 aligncenter\" src=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2022\/10\/PH\u00da-2.png\" alt=\"\" width=\"481\" height=\"380\" \/><\/p>\n<p style=\"text-align: center\">H\u00ecnh 2. Kh\u1ea3o s\u00e1t c\u00e1c tham s\u1ed1 \u0111i\u1ec1u khi\u1ec3n NP v\u00e0 H<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">Hai ph\u01b0\u01a1ng ph\u00e1p ESA v\u00e0 SHADE r\u1eddi r\u1ea1c \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 t\u00ecm ki\u1ebfm c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i t\u1ed1i \u01b0u cho l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000 MOX v\u1edbi h\u00e0m m\u1ee5c ti\u00eau F2. V\u1edbi ph\u01b0\u01a1ng ph\u00e1p ESA, c\u00e1c t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb alpha l\u00e0 0,95 v\u00e0 ti\u00eau chu\u1ea9n h\u1ed9i t\u1ee5 b\u1ed5 sung l\u00e0 10000. H\u00ecnh 3 (a) cho th\u1ea5y s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u00e0m m\u1ee5c ti\u00eau c\u1ee7a l\u00f2 VVER-1000 MOX trong qu\u00e1 tr\u00ecnh t\u00ecm ki\u1ebfm v\u1edbi 3 phi\u00ean b\u1ea3n ESA, SA v\u00e0 ASA. K\u1ebft qu\u1ea3 cho th\u1ea5y ESA c\u00f3 th\u1ec3 t\u00ecm \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh c\u00f3 gi\u00e1 tr\u1ecb h\u00e0m m\u1ee5c ti\u00eau t\u1ed1t nh\u1ea5t. V\u1edbi ph\u01b0\u01a1ng ph\u00e1p SHADE, H\u00ecnh 3 (b) m\u00f4 t\u1ea3 s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a gi\u00e1 tr\u1ecb OF trung b\u00ecnh theo s\u1ed1 th\u1ebf h\u1ec7 t\u00ednh to\u00e1n. K\u1ebft qu\u1ea3 cho th\u1ea5y l\u1ee3i th\u1ebf c\u1ee7a c\u00e1c c\u1ea5u h\u00ecnh \u0111\u01b0\u1ee3c ch\u1ecdn \u1edf m\u1ed7i th\u1ebf h\u1ec7 so v\u1edbi c\u00e1c c\u1ea5u h\u00ecnh th\u1eed nghi\u1ec7m. Ngo\u00e0i ra, gi\u00e1 tr\u1ecb OF trung b\u00ecnh c\u1ee7a c\u00e1c c\u1ea5u h\u00ecnh t\u1ed1t nh\u1ea5t th\u01b0\u1eddng t\u1ed1t h\u01a1n trung b\u00ecnh c\u1ee7a c\u00e1c c\u1ea5u h\u00ecnh \u0111\u01b0\u1ee3c ch\u1ecdn trong th\u1ebf h\u1ec7.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10039\" src=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2022\/10\/PH\u00da-3.png\" alt=\"\" width=\"1286\" height=\"540\" \/><\/p>\n<p style=\"text-align: center\">H\u00ecnh 3. S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a OF trong ph\u01b0\u01a1ng ph\u00e1p ESA (a) v\u00e0 SHADE (b)<\/p>\n<p style=\"text-align: justify\">K\u1ebft qu\u1ea3 t\u00ecm ki\u1ebfm cho th\u1ea5y c\u00e1c c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y b\u1edfi ESA v\u00e0 SHADE l\u00e0 gi\u1ed1ng h\u1ec7t nhau. C\u1ea5u h\u00ecnh t\u1ed1i \u01b0u c\u00f3 k<sub>eff<\/sub> l\u1edbn h\u01a1n c\u1ee7a c\u1ea5u h\u00ecnh tham chi\u1ebfu kho\u1ea3ng 1834 pcm. Trong khi \u0111\u00f3, h\u1ec7 s\u1ed1 \u0111\u1ec9nh c\u00f4ng su\u1ea5t xuy\u00ean t\u00e2m (PPF) c\u1ee7a c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u nh\u1ecf h\u01a1n kho\u1ea3ng 2,4 % so v\u1edbi c\u1ea5u h\u00ecnh tham chi\u1ebfu (B\u1ea3ng 5 v\u00e0 H\u00ecnh 4). S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ed1ng k\u00ea gi\u1eefa c\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 d\u1ef1a tr\u00ean ph\u01b0\u01a1ng ph\u00e1p Mann-Whitney U-test. K\u1ebft qu\u1ea3 cho th\u1ea5y r\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ESA v\u00e0 SHADE c\u00f3 hi\u1ec7u su\u1ea5t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi DE v\u00e0 l\u1ee3i th\u1ebf h\u01a1n so v\u1edbi SA v\u00e0 ASA.<\/p>\n<p>B\u1ea3ng 5. So s\u00e1nh c\u00e1c th\u00f4ng s\u1ed1 c\u01a1 b\u1ea3n c\u1ee7a c\u1ea5u h\u00ecnh tham chi\u1ebfu v\u00e0 c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u t\u00ecm \u0111\u01b0\u1ee3c<\/p>\n<table>\n<tbody>\n<tr>\n<td><\/td>\n<td>C\u1ea5u h\u00ecnh tham chi\u1ebfu<\/td>\n<td>C\u1ea5u h\u00ecnh t\u1ed1i \u01b0u<\/td>\n<\/tr>\n<tr>\n<td>k<sub>eff<\/sub><\/td>\n<td>1.13762<\/td>\n<td>1.15849<\/td>\n<\/tr>\n<tr>\n<td>PPF<\/td>\n<td>1.478<\/td>\n<td>1.443<\/td>\n<\/tr>\n<tr>\n<td>Flatness<\/td>\n<td>6.367<\/td>\n<td>6.870<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10040\" src=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2022\/10\/PH\u00da-4.png\" alt=\"\" width=\"4591\" height=\"1935\" \/>H\u00ecnh 4. So s\u00e1nh c\u1ea5u h\u00ecnh tham chi\u1ebfu v\u00e0 c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u t\u00ecm \u0111\u01b0\u1ee3c (a) v\u00e0 ph\u00e2n b\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a ch\u00fang (b)<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Nh\u1eefng<\/strong><strong> k\u1ebft qu\u1ea3 n\u1ed5i b\u1eadt c\u1ee7a nghi\u00ean c\u1ee9u<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">C\u00e1c nghi\u00ean c\u1ee9u nh\u1eb1m m\u1ee5c \u0111\u00edch ph\u00e1t tri\u1ec3n c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u ti\u00ean ti\u1ebfn, c\u1ee5 th\u1ec3 l\u00e0 ESA v\u00e0 SHADE, v\u00e0 \u00e1p d\u1ee5ng cho b\u00e0i to\u00e1n ICFM c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000. Nh\u1eefng k\u1ebft qu\u1ea3 n\u1ed5i b\u1eadt \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u00f3 l\u00e0:<\/p>\n<p style=\"text-align: justify\">(1) Ph\u00e1t tri\u1ec3n ch\u01b0\u01a1ng tr\u00ecnh LPO-V \u0111\u1ec3 t\u00ednh to\u00e1n c\u00e1c \u0111\u1eb7c tr\u01b0ng v\u1eadt l\u00fd c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng VVER v\u1edbi t\u1ed1c \u0111\u1ed9 t\u00ednh to\u00e1n nhanh v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u1ea3m b\u1ea3o. Ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u m\u1edbi \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n ICFM c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000.<\/p>\n<p style=\"text-align: justify\">(2) Ph\u00e1t tri\u1ec3n c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm t\u1ed1i \u01b0u ti\u00ean ti\u1ebfn ESA v\u00e0 SHADE \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh v\u00e0 \u00e1p d\u1ee5ng th\u00e0nh c\u00f4ng cho b\u00e0i to\u00e1n t\u1ed1i \u01b0u LP c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000. ESA l\u00e0 m\u1ed9t phi\u00ean b\u1ea3n c\u1ea3i ti\u1ebfn c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p SA ban \u0111\u1ea7u, \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t b\u1edfi nghi\u00ean c\u1ee9u sinh. Thay v\u00ec s\u1eed d\u1ee5ng to\u00e1n t\u1eed trao \u0111\u1ed5i nh\u1ecb ph\u00e2n\/b\u1eadc ba \u0111\u1ec3 t\u1ea1o c\u1ea5u h\u00ecnh th\u1eed nghi\u1ec7m m\u1edbi nh\u01b0 trong SA, ESA \u0111\u00e3 s\u1eed d\u1ee5ng to\u00e1n t\u1eed trao \u0111\u1ed5i ch\u00e9o cho hai c\u1ea5u h\u00ecnh c\u01a1 s\u1edf \u0111\u1ec3 t\u1ea1o c\u1ea5u h\u00ecnh th\u1eed nghi\u1ec7m m\u1edbi. Ph\u01b0\u01a1ng ph\u00e1p SHADE l\u00e0 phi\u00ean b\u1ea3n n\u00e2ng cao c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p DE v\u1edbi vi\u1ec7c s\u1eed d\u1ee5ng t\u00ednh n\u0103ng th\u00edch \u1ee9ng d\u1ef1a tr\u00ean l\u1ecbch s\u1eed th\u00e0nh c\u00f4ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c tham s\u1ed1 \u0111i\u1ec1u khi\u1ec3n $F$ v\u00e0 $CR$ m\u1ed9t c\u00e1ch t\u1ef1 \u0111\u1ed9ng. Ph\u01b0\u01a1ng ph\u00e1p RPI \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i vect\u01a1 th\u1ef1c sang vect\u01a1 nguy\u00ean trong ph\u01b0\u01a1ng ph\u00e1p SHADE r\u1eddi r\u1ea1c. \u0110\u00e2y l\u00e0 nghi\u00ean c\u1ee9u \u0111\u1ea7u ti\u00ean \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p SHADE cho b\u00e0i to\u00e1n ICFM.<\/p>\n<p style=\"text-align: justify\">(3) C\u00e1c t\u00ednh to\u00e1n t\u1ed1i \u01b0u LP cho l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000 MOX \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ESA v\u00e0 SHADE so s\u00e1nh v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c. So s\u00e1nh gi\u1eefa ESA, SA v\u00e0 ASA cho th\u1ea5y ESA c\u00f3 hi\u1ec7u su\u1ea5t cao h\u01a1n SA v\u00e0 ASA trong b\u00e0i to\u00e1n t\u1ed1i \u01b0u LP. So s\u00e1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ESA, DE v\u00e0 SHADE cho th\u1ea5y ba ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 hi\u1ec7u su\u1ea5t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. Tuy nhi\u00ean, \u01b0u \u0111i\u1ec3m c\u1ee7a SHADE l\u00e0 c\u01a1 ch\u1ebf th\u00edch \u1ee9ng \u0111\u01a1n gi\u1ea3n h\u00f3a \u0111\u00e1ng k\u1ec3 vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c tham s\u1ed1 \u0111i\u1ec1u khi\u1ec3n so v\u1edbi DE.<\/p>\n<p style=\"text-align: justify\">C\u00e1c c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u \u0111\u01b0\u1ee3c ch\u1ecdn t\u1eeb ph\u01b0\u01a1ng ph\u00e1p SHADE v\u00e0 ESA l\u00e0 gi\u1ed1ng nhau. C\u1ea5u h\u00ecnh n\u00e0y c\u00f3 s\u1ef1 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 v\u1ec1 gi\u00e1 tr\u1ecb $k_{eff}$ (l\u1edbn h\u01a1n gi\u00e1 tr\u1ecb c\u1ee7a c\u1ea5u h\u00ecnh tham chi\u1ebfu kho\u1ea3ng 1580 pcm). Trong khi \u0111\u00f3, $PPF$ nh\u1ecf h\u01a1n gi\u00e1 tr\u1ecb tham chi\u1ebfu kho\u1ea3ng 2,4 \\% v\u00e0 gi\u00e1 tr\u1ecb \u0111\u1ed9 ph\u1eb3ng c\u1ee7a ph\u00e2n b\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 g\u1ea7n nh\u01b0 nhau. K\u1ebft qu\u1ea3 ch\u1ee9ng minh r\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ESA v\u00e0 SHADE r\u1eddi r\u1ea1c \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0 \u00e1p d\u1ee5ng th\u00e0nh c\u00f4ng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c n\u1ea1p nhi\u00ean li\u1ec7u c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng VVER-1000.<\/p>\n<p><strong>C\u00e1c<\/strong><strong> \u0111\u1ecbnh h\u01b0\u1edbng <\/strong><strong>nghi\u00ean c\u1ee9u ti\u1ebfp<\/strong><strong> theo<\/strong><\/p>\n<p style=\"text-align: justify\">(1) Ch\u01b0\u01a1ng tr\u00ecnh LPO-V s\u1ebd \u0111\u01b0\u1ee3c n\u00e2ng c\u1ea5p \u0111\u1ec3 m\u00f4 ph\u1ecfng l\u00f2 ph\u1ea3n \u1ee9ng 3D v\u1edbi c\u00e1c \u00f4 m\u1ea1ng h\u00ecnh tam gi\u00e1c v\u00e0 h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n ch\u00e1y.<\/p>\n<p style=\"text-align: justify\">(2) Nghi\u00ean c\u1ee9u s\u00e2u h\u01a1n v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ESA, SHADE v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ti\u00ean ti\u1ebfn m\u1edbi \u0111ang \u0111\u01b0\u1ee3c l\u00ean k\u1ebf ho\u1ea1ch. Vi\u1ec7c m\u1edf r\u1ed9ng nghi\u00ean c\u1ee9u n\u00e0y sang t\u1ed1i \u01b0u h\u00f3a \u0111a chu tr\u00ecnh c\u0169ng \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn.<\/p>\n<p style=\"text-align: justify\">(3) Vi\u1ec7c m\u1edf r\u1ed9ng \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y cho b\u00e0i to\u00e1n t\u1ed1i \u01b0u LP v\u00e0 thi\u1ebft k\u1ebf v\u00f9ng ho\u1ea1t cho c\u00e1c lo\u1ea1i l\u00f2 ph\u1ea3n \u1ee9ng kh\u00e1c c\u0169ng \u0111ang \u0111\u01b0\u1ee3c t\u00ecm hi\u1ec3u v\u00e0 th\u1ef1c hi\u1ec7n.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: right\"><strong>Tr\u1ea7n Vi\u1ec7t Ph\u00fa, Vi\u1ec7n Khoa h\u1ecdc v\u00e0\u00a0 K\u1ef9 thu\u1eadt h\u1ea1t nh\u00e2n <\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><strong>C\u00e1c c\u00f4ng tr\u00ecnh c\u00f4ng<\/strong><strong> b\u1ed1 c\u00f3 li\u00ean quan c\u1ee7a t\u00e1c gi\u1ea3 v\u00e0 c<\/strong><strong>\u1ed9ng<\/strong><strong> s\u1ef1<\/strong><\/p>\n<ul>\n<li>Viet-Phu Tran, Giang T.T. Phan, Van-Khanh Hoang, Haidang Phan, Nhat-Duc Hoang, Hoai-Nam Tran; Success-history based adaptive differential evolution method for optimizing fuel loading pattern of VVER-1000 reactor; Nuclear Engineering and Design 377 (2021) 111125<\/li>\n<li>Viet-Phu Tran, Giang T.T. Phan, Van-Khanh Hoang, Pham Nhu Viet Ha, Akio Yamamoto, Hoai-Nam Tran; Evolutionary simulated annealing for fuel loading optimization of VVER-1000 reactor; Annals of Nuclear Energy 151 (2021) 107938<\/li>\n<li>Viet-Phu Tran, Hoai-Nam Tran, Akio Yamamoto, Tomohiro Endo; Automated Generation of Burnup Chain for Reactor Analysis Applications; Kerntechnik, ISSN 0932-3902, 82 (2017 ) 2 196-205.<\/li>\n<li>Viet-Phu Tran, Hoai-Nam Tran, Van Khanh Hoang; Application of Evolutionary Simulated Annealing Method to Design a Small 200 MWt Reactor Core; Nuclear Science and Technology, ISSN 1810-5408, Vol. 10, No. 4 (2020), pp. 16-23<\/li>\n<li>Nguyen Huu Tiep, Nguyen Thi Dung, Tran Viet Phu, Tran Vinh Thanh and Pham Nhu Viet Ha; Burnup calculation of the OECD VVER-1000 LEU benchmark assembly using MCNP6 and SRAC2006; Nuclear Science and Technology, ISSN 1810-5408, Vol. 8, No. 4 (2018), pp. 10-19<\/li>\n<li>Tran Vinh Thanh, Tran Viet Phu, Nguyen Thi Dung; A study on the core loading pattern of the VVER-1200\/V491; Nuclear Science and Technology, ISSN 1810-5408, Vol. 7, No. 1 (2017), pp. 21-27.<\/li>\n<li>Tran Viet Phu, Tran Hoai Nam; Discrete SHADE method for in-core fuel management of VVER-1000 reactor; 45th Vietnam Conference on Theoretical Physics (VCTP-45), 2020 (Poster)<\/li>\n<li>Viet-Phu Tran, Hoai-Nam Tran, Van Khanh Hoang; Application of Evolutionary Simulated Annealing Method to Design a Small 200 MWt Reactor Core; 6th Conference on Nuclear Science and Technology for young researcher, 08-09\/10\/2020<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>V\u1ea5n \u0111\u1ec1 qu\u1ea3n l\u00fd nhi\u00ean li\u1ec7u trong v\u00f9ng ho\u1ea1t Qu\u1ea3n l\u00fd nhi\u00ean li\u1ec7u trong v\u00f9ng ho\u1ea1t (In-core Fuel Management &#8211; ICFM), c\u1ee5 th\u1ec3 l\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u1ea5u h\u00ecnh n\u1ea1p t\u1ea3i nhi\u00ean li\u1ec7u, l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 quan tr\u1ecdng trong vi\u1ec7c thi\u1ebft k\u1ebf v\u00f9ng ho\u1ea1t l\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n v\u00e0 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n sau [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10041,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-10036","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-hoat-dong-cua-vien"],"_links":{"self":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/10036","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/comments?post=10036"}],"version-history":[{"count":0,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/10036\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/media?parent=10036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/categories?post=10036"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/tags?post=10036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}