30 octobre 2012
Le réacteur n° 1 a été mis à l’arrêt manuellement suite à la perte de 4 pompes de refroidissement. Ces pompes ont été perdues suite à la montée des eaux de la rivière superposée au bouchage de leurs filtres par les détritus charriés par la rivière suite à l’ouragan.
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Le niveau bas a été atteint sur les 4 générateurs de vapeur suite au lâché de vapeur dans l’atmosphère. Ceci a entrainé la mise en route de pompes pour compenser cette perte de débit. Ndr : la vapeur relâchée dans l’environnement était très probablement contaminée en radioéléments mais la NRC ne signale rien sur ce sujet.
Mise à jour le 30 octobre à 8 h 35 : Suite à la perte de refroidissement au condenseur un isolement manuel de la ligne de vapeur a été lancé. Les vannes d’isolation de vapeur ont fonctionné correctement. Le réacteur serait en contrôle automatique avec une pression de 155 bars pour une tempétrature de 549 degrés (ndr fahrenheit)
Le réacteur n° 2 pour sa part était en arrêt pour rechargement et aucun transfert de combustible n’est en cours
Facility : SALEM - State : NJ - Unit : [1]
Event Date : 10/30/2012 - Event Time : 01:09 [EDT]
Emergency Class : NON EMERGENCY
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Event Text
MANUAL REACTOR TRIP FROM 100% POWER
"This report if being made under the requirements of 10 CFR 50.72(b)(2)(iv)(B), Actuation of the Reactor Protection System While Critical, except preplanned, and under the requirements of 10 CFR 50.72(b)(3)(iv)(A), Valid Actuation of Listed System, except preplanned.
"Salem Unit 1 was operating at 100% reactor power when a loss of 4 condenser circulators required a manual reactor trip in accordance with station procedures. The cause of the 4 circulators being removed from service was due to a combination of high river level and detritus from Hurricane Sandy’s transit.
"All control rods inserted. A subsequent loss of the 2 remaining circulators required transition of decay heat removal from condenser steam dumps to the 11-14 MS10s (atmospheric steam dump). Decay heat removal is from the 11/12 Aux Feed Pumps to all 4 steam generators via the 11-14 MS10s. 11/12/13 AFW pumps started due to low level on all steam generators due to shrink from full power operation (this is a normal response). All safety related equipment functioned as expected. No one has been injured. As an additional note, Hurricane Sandy had recently moved past artificial island. Salem Unit 1 is currently in Mode 3. Salem Unit 2 reactor is currently in its 2R19 refueling outage and is shutdown and defueled with no fuel movement in progress."
The licensee has notified the NRC Resident Inspector. Notified R1DO (Caruso).
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2012/20121030en.html
The licensee has notified the NRC Resident Inspector.
* * * UPDATE ON 10/30/12 AT 0835 EDT FROM JOHN OSBORNE TO DAN LIVERMORE * * *
"At 0513, following [a] Unit 1 manual [reactor] trip due to loss of condenser cooling, a manual steam line isolation was initiated due to a high condenser back pressure. All main steamline isolation valves responded as expected. The high condenser back pressure resulted in the #11 low pressure turbine rupture disc relieving. Unit 1 remains in mode 3 with Reactor Coolant System temperature at 549 [degrees] and stable. Reactor Coolant System pressure is 2235 psig and in automatic control. Pressurizer level is on program at 26 percent level and in automatic control. Core cooling is via aux feed water and the steam generator levels are on program. There were no [personnel] injuries."
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