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Global Patent Index - EP 2564393 A4

EP 2564393 A4 20150311 - METHOD OF CALIBRATING EXCORE DETECTORS IN A NUCLEAR REACTOR

Title (en)

METHOD OF CALIBRATING EXCORE DETECTORS IN A NUCLEAR REACTOR

Title (de)

VERFAHREN ZUR KALIBRIERUNG VON EXCORE-DETEKTOREN IN EINEM KERNREAKTOR

Title (fr)

PROCÉDÉ D'ÉTALONNAGE DE DÉTECTEURS À L'EXTÉRIEUR DU CÆUR DANS UN RÉACTEUR NUCLÉAIRE

Publication

EP 2564393 A4 20150311 (EN)

Application

EP 11775431 A 20110414

Priority

  • US 77087010 A 20100430
  • US 2011032408 W 20110414

Abstract (en)

[origin: US2011268239A1 ] A method of calibrating excore detectors for a pressurized water reactor (PWR) includes: measuring peripheral core flux signals using excore detectors disposed at a plurality of locations spaced about the periphery of the core, and using the measured power distribution from either a core monitoring system or in-core flux measurement. Calibration of the excore detectors is broken into two parts: (1) the relation between the excore detector signal and weighted peripheral assembly axial offset, and (2) the relation between weighted peripheral assembly axial offset and core average axial offset. Relation (2) can be determined by a representative neutronics model. Accuracy of the neutronics solution is improved by applying nodal calibration factors, which represent the ratio of the measured three-dimensional power distribution to the nodal predicted three-dimensional power distribution and correct the neutronic results to match what would be measured if predictive scenarios were actually performed in the actual reactor core.

IPC 8 full level

G21C 17/108 (2006.01) ; G21D 3/00 (2006.01) ; G21D 3/08 (2006.01)

CPC (source: EP US)

G21C 17/108 (2013.01 - EP US) ; G21D 3/001 (2013.01 - EP US) ; G21D 3/08 (2013.01 - EP US) ; Y02E 30/00 (2013.01 - EP) ; Y02E 30/30 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

US 2011268239 A1 20111103 ; BR 112012027775 A2 20170808 ; CN 102859607 A 20130102 ; CN 102859607 B 20150826 ; EP 2564393 A1 20130306 ; EP 2564393 A4 20150311 ; JP 2013525796 A 20130620 ; JP 5954902 B2 20160720 ; KR 20130079340 A 20130710 ; WO 2011136933 A1 20111103 ; ZA 201207895 B 20130626

DOCDB simple family (application)

US 77087010 A 20100430 ; BR 112012027775 A 20110414 ; CN 201180019787 A 20110414 ; EP 11775431 A 20110414 ; JP 2013507997 A 20110414 ; KR 20127027061 A 20110414 ; US 2011032408 W 20110414 ; ZA 201207895 A 20121019