ML20009C216

LER 81-067/01X-1:on 810225,radiographic Test of Loops B & C Main Steam Piping,Revealed Linear Indications in Welds 36 & 22.Cause of Defects Under Investigation.Repairs Planned

ML20009C216
Person / Time
Site:	Surry
Issue date:	02/25/1981
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-81-067-01X, LER-81-67-1X, NUDOCS 8107200382
Download: ML20009C216 (3)

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SURRY 70ifEI STATION, IINIT 1 DOCKET NO- 5&280 -' O P 7 '0~ ~

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/ / g' r a l REPORT 30: 80-067/01X-1 g ] 4)g t-l EVENT'n42Er 10-26-80 Q

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MAIN STEAM PIPDIC WELD DESSEPANCIES 6 4 D.

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1. _ DESCRIPTION _0F_ M,3,_T,

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With the Unit defueled, nadiography aummination of the Main Steam elbow at the il Steam , Generator outlet nozzle revealed indicacious in the veld area. The il snMentions were found on all three Steam Generators. This == -ination was ':

... being preformed as required by ETA 30006 in preparation for Steam Generator l _ replacement. The indications are judged to be artifacts of the welding process-and not earvice induced. This event is reportable per Technical Specification l ,

(, . 6.6.2.a.(9). .

2. PennAmtm ccNSEODENCES .

Tbs integrity of the Main Steen Piping may have been degraded. Since the tinic is in a defueled condition, the health and safety of the public was not affected.

3. .rma .

l .The indications were the zusults of original construction of,the main staan system. , ,

, , 4. _110tEDIATE rnmew"TTTE ACTIONS A revj:ps of the original construction records was initiated to determine the origin of t ===

h ladications. The results of the' review revealed that these indications did exist, and were ori=4==11y judged to be acceptable.

E ' SURSayuzm CDRRECTIVE' ACTIONS

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' The subject veld areas will be completely machined ont and repisced during the

_,", _ Steam Generator Esp 1=a - *.

6. ACTION TAKEN TO PRETERT MECURRENCE None

7. GENERIC INFLICATIONS l

An evaluation of the original radiographs of the main steam piping inside the containment is in pus;ress. Approximately 401 of the original radiographs j have been evaluated and no rejectable indications have been identified. In i addition. If examination of some of the welds will be conducted to confits the l i '. results of the above evaluation. Tbs evaluation and IT ===ination will be com-  ;

b- plated p - w ivydrostatic testing of the Stean Generators. A sinflar review l l of original constreetion radiographs for tinit No. 2 is in progress. It should l be noted that tf maale to albow welds for unit No. 2 were replaced during the j Steam Generator age. ,

l 8107200392 810225 SP l PDRADOCK05000g l s

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ATTAQDENT 1 ,

Surry Power S'ation Unit 1 Dochac No: 50-280 j Baport no: 80-067/ 01X-1 .,

Event Date: 10-28-80 i UPnATNn MtPORT I.)' nascaIrnos .

UtLile conducting h awamination as described in the ". Generic Implicatsmes"

- to LIR-80-067/01T-0. linear iaMemelos sus discovered la the "A" loop main steams piping. ,

2.) Panmaar2 CONS 8QOENCES Since the unit was in a defnalad condician, the health and safety of the public were not affected.

3.) cansa The cause df the indication,is under investigatica.

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g i to the findings reported in LBt 80-067/01T-1. Since the uoit is in a defuoted 1 l

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