22 juin 2015
Cette concentration inférieure aux prescriptions a été découverte dans le réservoir de liquide d’injection d’appoint. Cette défaillance du réservoir sans redondance aurait pu empêcher le contrôle des rejets radioactifs et l’atténuation des conséquences d’un accident. Les mesures sont prises pour rétablir le taux d’hydroxyde de sodium dans les limites des spécifications techniques.
Type : PWR - Puissance : 3 459 MWth - Première divergence : 12/1976
Available in english only.
Event Number : 51170
Facility : SALEM - State : NJ -
Unit : [1] - RX Type : [1] W-4-LP
Event Date : 06/22/2015 - Event Time : 14:06
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Initial PWR : 100 % - Current PWR : 100 % -
Event Text
SODIUM HYDROXIDE BELOW TECHNICAL SPECIFICATION REQUIRED CONCENTRATION
"At 1406 [EDT] on 6/22/15, the chemistry sample results for the Salem Unit 1 Containment Spray Additive tank were below the minimum Technical Specification requirement for NaOH [Sodium Hydroxide] concentration. The Containment Spray Additive tank was declared inoperable at that time in accordance with Technical Specification 3.6.2.2.a. Based on the fact that there is no redundant equipment for the Containment Spray Additive tank, this condition could have prevented this Safety System from Controlling the Release of Radioactive Material and Mitigating the consequences of an accident.
"This event is being reported under the requirements of 10 CFR 50.72(b)(3)(v)(C) and (D) as ’Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of systems that are needed to Control the Release of Radioactive Material and Mitigate the Consequences of an Accident.’ Actions are being taken to restore the NaOH concentration to within the Technical Specification limits.
"The Licensee has notified the NRC Resident. No one was injured as a result of the event."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2015/20150623en.html#en51170