ML20024D076

LER 83-080/03L-0:on 830626,control Room Operators Experienced Problems W/Hvac Sys Involving Inadequate Cooling Capacity & Sys Losses.Partially Caused by Malfunctioning Condenser Cooling Water Flow Control valve.W/830725 Ltr

ML20024D076
Person / Time
Site:	Grand Gulf
Issue date:	07/25/1983
From:	Mcgaughy J, Rohrer M MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
AECM-83-0426, AECM-83-426, LER-83-080-03L, LER-83-80-3L, NUDOCS 8308030130
Download: ML20024D076 (2)

Text

c,Rt U. S. NUCLEAA CEGULATOftY COnehti884000 LICENSEE EVENT REPORT Attachment to AECM-83/0426 Page 1 Of 1

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Q ptsass PantT Oft TYPE ALL REQUIRED INFORMATION)

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O Is sTo dl 01 51010101411 OO 61 DOCKET NUM96R l 6@l Ol88 6 l EVENT el 2I 6DATE l 813 h 0 4 7lREPORT 74 75 21 CATE d 8 l 3l@ 80 EVSN1 GGSCRtPTION AND PROSA8LE CONSEQUENCES h l'O ITI{ lhn4 nn4 nn nn A-?A-R3; the central Remm (CR) acerators beoan exoeriencinal I O ITl! lorabl ems with the CR HVAC system. The arablems involved inadecuate

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l O 4 lemoling caomcitv (one train comratino) and system losses (cyclino l E lbetween train A Sc B) for reasons unknown at this time. CR area tempera- l 10161Iturma exceeded the 77 degree F limitation of T.S.3.7.8 a number of timesj lOF7)lbut bv no more that 2 degrees. The event had no affect on the health andi l'OT81 tsafetv of the oublic and did not constitute a threat to plant sufety. I 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SU8 CODE COMPONENT CODE SuaCODE SUSCcDE 7

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@ b cause is under investication although a partial cause has already l t i Ibeen attributed to a malfunctionina condenser coolina water flow controll i 2 1. val ve . An update report with further details is expected to be l t 3 ) submitted by 9-20-83. This event involved entering the action statements l i o lof T.S.3.7.2 and 3.7.8 and is reported pursuant to T.S.6.9.1.13.b. l 7 8 9 80 STA S  % POWER OTHERSTATUS DISCOV R DISCOVERV DESCRIPTION i 5 W@l01010@ M l @ Abnormal operation l ACTIVliv C TEasi AMOUNT OF ACTIVITY LOCATION OF RELE ASE 1 6 RF LE ASE D@OF RE LE ASE lM l lH l 7 8 9 30 11 44 4 80 PEASONNEL EaPOSURES poundBER TYPE DESCRIPTION 8 l o' *l o 1 ol@u J@l u I

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NAME OF PREPARER

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. .u,sn e ,* , MISSISSIPPI POWER & LIGHT COMPAN,Y! w Helping Build Mississippi .

Q P. O . B O X 1640, J AC K S O N, MIS SIS SIP 6 205 'Wif}

July 25, 1983 88

'~un::.=r '" Og Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Region II 101 Fbrietta St., N.W., Suite 2900 Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly, Regional Administrator

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-13 File 0260/L-835.0 Problems With Control Room HVAC System LER 83-080/03 L-0 AECM-83/0426 Beginning on June 26, 1983, the Control Room operators began experiencing problems with the Control Room HVAC system. The problems involved inadequate cooling capacity and system losses. Control Room area temperatures exceeded the 77*F limitation of Technical Specification 3.7.8. The action statements of Technical Specifications 3.7.2 and 3.7.8 were entered. The event is reported pursuant to Technical Specification 6.9.1.13.b. Attached is LER 83-080/03 L-0.

Yours truly,

^

JPM: sap k 7 / // /u/

Attachment /

cc: Mr. J. B. Richard (w/a)

Mr. R. B. McGehee (w/o)

Mr. T. B. Conner (w/o)

Mr. G. B. Taylor (w/o)

Mr. Richard C. DeYoung, Director (w/a)

Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Document Control Desk (w/a)

U. S. Nuclear Regulatory Commission Washington, D. C. 20555

.wcw,cnAQ Member Middle South Utilities System hz f_ W s