ML18030A120

Notifies of Potential Deficiencies Er 100450 & Er 100508 Re States Co Sliding Links.Failure Occurs in Form of Crack Between Threaded Screwhole & Side of U-shaped Link.Will Advise of Date of Final Rept

ML18030A120
Person / Time
Site:	Susquehanna
Issue date:	06/23/1980
From:	CURTIS N W PENNSYLVANIA POWER & LIGHT CO.
To:
References
ER-100450, ER-100508, PLA-499, NUDOCS 8006270342
Download: ML18030A120 (4)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)ACCESSION NBR:8006270342 OOC,DATE: 80/06/23 NOl'ARIZEO:

NO FACIL:usauehanna Steam Electric Stationi Unit 1r Pennsylva-38'ouehanna Steam Electric StationP Unit 2I Pennsylva A'~AUTHOR AFF IL I A T IO'Tl C SPN.i'I~Pennsylvania Power ilLight Co~REC IP.~A:.E RFC IP IF N T AFF ILIA 7 ION DOCKET¹05000387 05000388

SUBJECT:

Notifies of Potential Oef iciencies ER 100450 F ER100508 re States Co sliding links.Failure occurs in form of crack between thr ceded screwhole L side of U shaoed 1 ink,&i 1 1 advise of date of final rept'ISTRISUT TUN COOS: 8019S COPIES RECEIVES:LTR g ENCL Q SIZ ESJB T I l'LF: Cons t ruc t i on Deficiency Reoor t (10CFR50~55E)BOOTES:~g W M~3 Q~)re~+~~RECIPIENT I O DOE/i"JA ETRE ACTION: AD I()Q~Ar~+21 20 r I uTlR~.'AL:

AC/RC I/IE EOO R STAFF 07 F I ELO COOR/IE13 HYD/GEO BR 22-LIC QUAL BR<PA 08 VELD 23 PR C TS l'EV BR G 01 COP IES LTTR FNCL REC IPIE'TiT IO CODE/'Ti A'4E BC pvry+~od d 15 PH AEOD EQUIP QUAL BR 16 HANAUERPS~IRE 05 MOOREEV~NRC PDR 02, OR ASSESS BR 17 QA BR 10 STANORDS OEV 11 COP IES LTTR EN 1 1 EXTERNAL'CRS NS IC 24 04 16 1 1 LPOR 03 due 3 p>F80 0 TOTAL NUi!BER OF COPIES REQUIRED: LTTR 41 ENCL 1 0 TWO NORTH NINTH STREET, ALLENTOWN, PA.18101 PHONE: (215)821-5151 NORMAN W.CURTIS Vice President Engineering 8 Construction 821-5381 June 23, 1980 Mr.Boyce H.Grier Director, Region I U.S.Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 SUSQUEHANNA STEAM ELECTRIC STATION NOTIFICATION OF A POTENTIAL DEFICIENCY ON STATES COMPANY SLIDING LINKS ERs 100450/100508 FILE 840-4 PLA-499

Dear Mr.Grier:

This letter serves to confirm information provided by telephone to NRC Inspector Mr.R.McGaughy by Mr.A.R.Sabol of PP&L on June 17, 1980.During that conversation, Mr.McGaughy was advised that the subject condition was being evaluated for reportability under the provisions of 10CFR50.55(e).

The defect involves the failure of the U-shaped link on the States Company sliding link terminal block.The failure occurs in the form of a crack between the threaded screwhole and the side of the U-shaped link.The U-shaped link and associated spacer forms a connection between two slotted bars on the terminal block when the spacer and link are tightened by a screw.When the screw is tightened a crack may result which can cause an open or a poor electrical connection.

Since these links are used on safety related equipment, the defective condition has been evaluated as potentially reportable under the provisions of 10CFR50.55(e).

The subject defect has also been previously recogni ed by the NRC and was described in your Information Notice 80-08 issued on March 7, 1980.Bechtel has under development a sampling procedure which includes guidance for their Quality Control field organization to inspect the links.The PP&L Integrated Startup Group will also be instructed to follow the guidance outlined in the sampling plan whenever they operate the links during preoperational testing activities.

We expect this approach to provide us with quantitative information on the extent of the deficiency.

8OO6S7 o>~Since the details of this report provide information relevant to the reporting requirements of 10CFR21, this correspondence is considered to also discharge any formal responsibility PP&L may have for reporting in compliance thereto.go/1 5 PENNSYLVANIA POWER 4 LIGHT COMPANY//g Mr.Boyce H.Grier June 23, 1980 PP&L and Bechtel are continuing to analyze the problem and to establish an acceptable corrective action plan.Based upon the satisfactory completion of our investigation, we will advise the Commission of the date by which a final report will be submitted should the conditions be determined to be reportable.

N.W.Curtis Vice President-Engineering 6 Construction-Nuclear FLW:mcb cc: Mr.Victor Stello (15)DirectorWffice of Inspection 6 Enforcement U.S.Nuclear Regulatory Commission Washington, D.C.20555 Mr.G.McDonald, Director Office of Management Information 6 Program Control U.S.Nuclear Regulatory Commission Washington, D.C.20555 Mr.Robert M.Gallo U.S.Nuclear Regulatory Commission P.0.Box 52 Shickshinny, Pennsyl'vania 18655