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13:17 Sep 16, 2019
On 9/16/19 at 0817 CDT, the Division 1 and Division 2 reactor water cleanup (RT) system differential flow instrumentation was declared inoperable due to failing downscale caused by flashing in the sensing lines that occurred during reactor cooldown for refueling outage C1R19. The Division 1 and Division 2 RT differential flow instrumentation were declared inoperable in accordance with Technical Specification 220.127.116.11 Conditions D and E which require restoring at least one division of instruments to operable status within one hour. This condition renders the leakage detection system incapable of performing its safety function, thus it is reportable under 10 CFR 50.72(b)(3)(v)(D).
In response to the above, system alignment was changed to increase subcooling to restore indication. Division 1 and 2 Division RT differential flow instrumentation were declared operable at 0852 on 9/16/19.The NRC Resident Inspector has been notified.
Illinois (NRC Region 3)
|10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident|
|LER:||look for an ler...|
|Time - Person (Reporting Time:+1.3 h0.0542 days <br />0.00774 weeks <br />0.00178 months <br />)|
14:35 Sep 16, 2019
|NRC Officer:||Andrew Waugh|
|Last Updated:||Sep 16, 2019|
|54281 - NRC Website|
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