ML20049A408
| ML20049A408 | |
| 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 | |
| RO-81-005, RO-81-5, NUDOCS 8101270660 | |
| Download: ML20049A408 (2) | |
Text
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B ALTIMORE G AS AND ELECTRIC comp ANY
... 1 m S ALTIM Oe s. M A R YL AM o a1203 TM...',".,.'a..*m!",* T.'.S. ":"J........
January 20. 1481 Mr. ' oyce et, i-rier. Director d
Office of Insnection & Enforce..ent U.S. Nuclear Regulator, ro riission Recion 1 631 Park Avenue Xiao of Prussia. P4 loa %
WB.itCI: Docket 40. 50-315 LE'i 31 06 This is to confim our veriaal notification to your "r. bleh arcsitzei of an inadvertant noenina of cows.r onerated relict volve RC AC4-EHY.
This rerort is beinn r,ade in accordance witn IV inst'ection Rcenrt 317-79-23.
0 At 0647 on 1-18-81 irith the Rector Coolant Svste n (RCS) at 720 F and 230 esfa during a cooldoven for a scherfuled refueline outace, nressure indicatine controller P!C-103-1 failee' hien causine PC-404-ERY to onen.
P!C-103-1 monitors pressurizer acessure and nrovides a sianal to onen t
RC-404-ERY at 430216 nsia when the OCS is below 2MDF. Wnen the valve onened the enerator received *PORY/ Safety Valve Acoustic !'onitor" and i
"PORY Ener ized" 41 ann. /tf ter acknowledcino t'ic 41anns. the entrator i
noted that 8.C-404-ERY was oren and shut newer relle' isolatioit RC-405-!iOV tenninatine the discharne.
IT-414-ERY was cren Icss than ene minute and RCS pressure decreased a'nroxinately six rsi.
The redundant over nressure oretection syster rcNinet* nrerabic durine tne event, i
A com1ete descrintion of the cause and corrective action will be contained in the follow-un renert.
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