ML20037C283
| ML20037C283 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 01/20/1981 |
| From: | BALTIMORE GAS & ELECTRIC CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 8102030431 | |
| Download: ML20037C283 (2) | |
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BALTIMORE G AS AND ELECTRIC comp ANY PO Sox 1476 S A LTIM OW W. MARYLAND alaoS 980 CLEAR POe8A DEPARista s cAtwent CLisas seuckram possa *Lawt Luser, sesmykaseo soest Januar / 20. 1981 Hr. Bo.vce H. f rier. Director Office of Insnection ', Enforce ~ent U.S. Nuclear Reu14torv Co riisslors Recion 1 631 Park Avenuc Xinn of Prussia. Pri ioan6 WP.8LCI: Docket 40. 50-315: LER SI off This is to confim our verival notification to your "r. bleh Arc titzel of an inadvertant ooenina of rowtr operated relicf volve. RC 404-E.9V.
This rerort is beine nede in accordance witti IAF insrection 4cenrt 317-79-23.'
0 At 0847 on 1-18-81otith 'the Reactor con 1' ant Svstem (RCS) ~at 720 F and 230 esfa during a cooldown for s scheduled refuelige outace, nres.sure indicatine contro11cr PIC-103-1 failer' hich causine PC-404-ERV to onen.
PIC-103-1 monitorn pressurizer "ressure and nrovides a sianal to open j
RC-404-ERY at 430t16 nsia when the 'CS is below 2hM. Wnen the valve i
onened the enerator received *P9RY/ Safety YalVC Acoustic l'ogitor" and i
"PORY Enemized" starets. After acknowleucine tuo alems, the enerator i
noted that. RC-404-ERY was open and shut newer relle* isolation RC-405-!CV terminatine the di';charne.
IT-434-ERY was oren Icss than ene minute and RCS pressure decreased a'eroxinately six rsi.
The redundant over
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nressure nectection systeer rcre inet* nrerabic durine the event.
A com1ete descriation of the cause and corrective action will be t
contained in the follow-un renert.
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L.B. Nesse11 Director. Office r.* **anaarnent Infomation OOg and Procran Centrol Messrs:
J.A. Tiernan 1
R.M. Douclass
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NRC PORM GS4 U.S. NUCLEAR RE!ULATORY COMMIS$40N (741 LICENSEE EVENT REPORT CONTROL BLOCK: 1 I
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NAME OF PREPARER PHON E: