05000325/LER-1982-064

LER 82-064/03L-0:on 820615,post-accident Monitoring Control Room Recorder/Indicator 1-CAC-AR-1259 Erraticaly Indicated Drywell Oxygen Concentrations.Caused by Erratic Instrument Output Due to Unknown Causes.Unit Replaced

ML20055B720
Person / Time
Site:	Brunswick
Issue date:	07/13/1982
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20055B716	List: 05000325/LER-1982-064, Forwards LER 82-064/03L-0
References
LER-82-064-03L-01, LER-82-64-3L-1, NUDOCS 8207230183
Download: ML20055B720 (1)

LER-2082-064,

Event date:
Report date:
3252082064R00 - NRC Website

text

NRC FORM 366 tJ. S. NUCLE AR REGULATORY COMMISSION (7-7H y ' 'c LICENSEE EVENT REPORT CONTROL BLOCm [ l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 jo lil lU IC lB lE lP l 1 l@l0 l0 l- l0LICENSE14 15 l0 l0NUMBER l0 l0 l- l0 l0 l@l4 l1 25 26 l1 l1l1l@l$7 CAT LICENSE TYPE Jo l

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7 14 60 61 DOCKET NUVBER EVENT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l 0 l 2 l l During plant operation, routine surveillance revealed nost-accident monitorino conrrn1l l 0 l 31 l Room recorder / indicator, 1-CAC-AR-1259, was erratically indicatina drywell oxveen l l o l 4 l l concentrations. At the time redundant instrument. 1-CAC-AR-1263. was indicatine l loisl l expected drywell oxygen concentrations. This event did not affect the health and 1 0 6 l safety of the public. __j 10171 1 I l O is l l Technical Specifications 3. 3.5. 3, 3.6.6.4. 6.9.1.9b I 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SU8 CODE COMPONENT CODE SU8 CODE SUBCODE l0l9]

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l 1101 lThe event was caused by erratic instrument outnut in rhn electrnmnenotic unir nf tho l l i l i j l monitor oxygen analyzer. 1-CAC-AT-1259-2. The cause of rho orrnric nuernie enu1A nne I

, 2 [be determined. The defective electromagnetic unit was renlaced and the nnniv7er. Mndoll lil3l lNo. F3M3 was returned to service. These analyzers will be renlaced as narr of nn I i 4 lapproved plant modification. I 7 8 3 80 ST S  % POWER OTHE R STATUS IS O RY DISCOVERY DESCRIPTION l1 I s l y(3) l0l6l0l@l NA l b @l Operator Surveillance l ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 1 6 h [_Z_j@l NA l l 45 NA 80 l

7 8 9 10 11 44 PERSONNEL E XPOSURES NUMBER DE SC RIP TION -

l l t l 7 l l 0 l 0 l0 lhlTYPEZlhl NA PERSOf 4NE L INJURIES

• NuvrsER oESCRiPTiO9h I l 11010 7 8 9 l0 l1l@l 12 NA 80 l

LO'a OF OR DAMAGE TO FACILITY Q TYPE DE SC RIP TION v l

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NAME OF PREPARER M. J. Pastva, Jr. pgoye 919-457-9521