ML20148T136
| ML20148T136 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 05/22/1974 |
| From: | Rone A JERSEY CENTRAL POWER & LIGHT CO. |
| To: | |
| References | |
| AO-50-219-74-33, NUDOCS 8102190760 | |
| Download: ML20148T136 (3) | |
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5/22/74
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'0YSTER CRUUX NUCLEAR GENERATING STATION
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- THIS DOCUMENT /CO.NT INS AbnorIa1 Occurrence 3
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P0ORQUAUT.,6PAGES'
.,j lRoport No. '50-219/74/ 33
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. IDERTIFICATION.
Violation of the Technical Specifications, p'aragraph 3.4 Bh4, 0F OCCURRENCE:
When it was observed that both auto-depressurization system
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jinitiction tirors,16H232A and 16H232B, failed to complete l,2,.T,"...., /.their ticing cycle in Icss th::n two minute,s.
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'4his' event is considered to'.bo.an abnornial occurrence as de-
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fined in :the Technien1 Specifications, paragraph 1.1!iB P, D..
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CONDITIONS: PRIOR
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Routincl Shutdown TO OCCURRENCG:
Steady State Power
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Cold: Shutdown 4oad Channes Durin8
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1he' reactorsnode switch',was in REFUEI, with the cavity
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- . U. '.a DESCRIPTION lWhile perfdrning tho' annual automatic"initini test of the auto-OF 0CCURRENCE:
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.depressurization system, it was observed that both system l
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. initiation timers,16H232A and <16H232B, cocpleted their cyc1,c "in'169 seconds and 127 seconds, respectively,' which is greater
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rassure;'and 230 psig at the r charge of one: core spray
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booster purp sij;n.als. Se timers may:be manually yecycled by tho' operation of a keylock reset switch located on Panel.1P/2P in r
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be not'ed tha't system initiation'will occur as soon.as any one y.
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tiiter completos> its' cycle.
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'APPAREhT CAUSB gn W
, U-L. Unusual Service. Condition Manufacture-OF OCCURR'2:CE:
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ne cause of the;.' occurrence is. presently under inve'stigation.
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ANALYSIS OF' Re, auto-depressuritation system is: required to depressurize
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the reactor! vessel to less than 205:psig.in the event of a small
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' break design bases-LOCA.
In this event; ~it is possible for-t.
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the. reactor. pressure to renain above the core spray, pernissive r
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Re; significance of this delay is under investigation'.
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COPJECTIVE E6 tiaers wore reset and were observed to ti::e out:in: loss ACTION:
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than two ctinutes. no results of which were: 1p232Apl17,
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