ML19329B155
| ML19329B155 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse, Oyster Creek |
| Issue date: | 04/20/1972 |
| From: | Finfrock I JERSEY CENTRAL POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19329B145 | List: |
| References | |
| NUDOCS 8001300728 | |
| Download: ML19329B155 (2) | |
Text
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Jersey Central Powe'r & Light Company
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IdADISCN AV'ENUE AT PUNCH BOWL RO AD e MORRISTOWN. N.J. 07960
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April 20, 1972 9i.
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c.c. Ya h d,,b Dr. Peter A. Morris, Director 7
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Division of Reactor Licensing 1
g United States Atomic Energy Co=sission Tl.h'% p3 57ashington, D. C. 20545 N
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Dear Dr. Morris:
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Subject:
Oyster Creek Station Docket No. 50-219 Loss of Secondary Containment Integrity p')
The purpose of this letter is to report to you a violation
- Q' of a Limiting Condition for Operation in that Secondary Contain=ent Integrity was not maintained as required by Specification 3.5.3.1.
of our Techni:al Specifications.
On April 11, 1972, during perfor=ance of a routine weekly surveillance test of isolation of the Reactor Building and initiation of the Standby Cas Treatment System due to simulated high radiation levels on the Reactor Building Operating Floor and in the Reactor Building Ventilation Exhaust ducts, the supply dampers for the Reactor Building Ventilation Systes failed to close as required.
As a result of this failure, Secondary Contain=ent was not in effect.
Isolation of the Reactor Building Ventilation System supply damper is initiated by "b" contacts fro: the Reactor Building Ventilation Systcm supply fans, SF1-12 SF1-13, and SF1-14 wired in series. However, due to an elcetrical problem with supply fan 1-13, which resulted in the discovery that the =otor was shorted, its supply breaker was racked-out.
Thus, the logic control circuit for the da=pers was " opened", the nor=al situation with the fans in operation. When the rc=aining fans werc tripped during the surveillance test conducted at 2:C0 a.s. on I
April 11, 1972, the logic control circuit was still open, the da:per gontrol relays remained de-energised, and the danpers did r.ot close.
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