ML18031A112

Confirms Info Provided to NRC Inspector on 790227 Re Reportable Deficiency.Bechtel Has Advised That Generic Problem Exists Re Failure of Manufacturer to Stake Stem Nuts Fastening Certain Limitorque Motor Operators

ML18031A112
Person / Time
Site:	Susquehanna
Issue date:	03/02/1979
From:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
PLA-329, NUDOCS 7903070362
Download: ML18031A112 (4)

Text

RE'GULATO INFORt!ATION DISTRIBUTION TEt!i (RIDS)

ACCESSION NBR :7903070362 DOC.DATE: 79/03/02 NOTARIZED: NO DOCKET FAG II:5 SUSQUEHANNA STEAb! ELEC TRIG S l'A T ION, UNIT 1 PENNSYI VA 05000387 50 3 8 USQUKHAtuNA STEAt4 ELECTRIC STATIONS UNIT 2g PENNSYLVA 05000388 A TH,i AUTHOR 4FF IL I A T ION CURTIS N ~ 5 ~ PENNSYLVANIA POKER 8 LIGHT CD ~

REC IP ~ NAt!E RECIPIENT AFF IL IATION GRIER g B ~ h ~ REGION 1 PHILADELPHIA OFFICE OF THE DIRECTOR

SUBJECT:

CONFIRMS INFO PROVIDED TO NRC INSPECTOR ON 790227 RE REPORTABLE SUB JECT DEF IC IE!ACY.BKCHTEL HAS ADVISED THAT GENERIC PROBI EM EXISTS RE FAILURE OF iiFG TO STAKE STEt'> luUTS FASTENING CERTAIN LItlITORQUE ROTOR OPERATOR ~

DISTRIBUTION CODE: B019S TITLE:

COP IF S RKCE I VED: L TR L ENCL ~

CONSTRUCTION DEFICIENCY REPORT (10CFR50 ~ 55E)

S I ZE:

~

NOTES: ~&10 ~~ ~ 3 + 5. FS~ + rfO S.c RECIPIENT COP IES RKC IP IENT COPIES ID CODE/NAME LTTR,ENCl ID COOK/NAHE LTTR ENCL ACT ION: 14 PH QIPM 15 BC C-+JR~ 5 20 LA 21 AD QA5$ Ptc-4-o 0

l~ E

~@~3'NTERNAL:

02 NRC POR 07 FDO 6 STAFF 08 i~!!P A 09 OEP Y OIR DPN 10 GAB 11 STANORDS DEV 12 JORDAN'/IE 13F IELD COOR/IE 16 AD FOR ENGR 17 AD PLANT SYS 17 AO REAC SFTY 19 AD SYS/PROJ 22 DIR OPM 23 OFLD EXTERtuAL: 03 LPOR 1 04 NSIC 24 4CRS 16 1

't' REGULA Tp[',y Dphil(ET FILE CG, TOTAL NUt BKR OF COPIES REQUIRED: L TTR 39 EiuCL

/"

('> ">

TWO NORTH NINTH STREET, ALLENTOWN, PA. 18101 PHONE: (215) 821-5151 NORMAN W, CllRTIS Vice Presiuent.Engineering 8 Construction 821.5381 March 2, 1979 Mr. Boyce H. Grier Director, Region I U. S. Nuclear Regulatory Commission 621 Park Avenue King of Prussia, Pennsylvania 18406 SUSQUEHANNA STEAM ELECTRIC STATION INTERIM REPORT .OF A DEFICIENCy IN THE INSTALLATION OF LIMITORQUE MOTOR OPERATORS ON VALVES ERs 100450/100508 FILE 840-4 PLA-329

Dear Mr. Grier:

This serves to confirm information provided to NRC Resident Inspector R: Gallo on 2/27/79 and relates to the subject deficiency which has been determined to be reportable under the provisions of 10CFR50.55(e).

PPIrEL has been advised by Bechtel Corporation's quality assurance staff organization that a generic problem exists with regard to the failure of valve manufacturers to stake the stem nuts fastening certain Limitoraue motor operators to valves. This condition has been identified'ith respect to Limitorgue Model No. SMB and Model No. SMC motor operators.

The potential for impact on safety has been established since the failure to stake the lock nut may result in the operators of their respective valves to cease operating at any valve position. In assuming a worst case condition for safety related systems, failure of a valve operator its respective valve could affect the safe shut down of to properly acctuate the plant.

Bechtel's Quality Assurance Supervisor for the SSES Project has, through MCAR-1 G-l, directed that a plan for investigation and corrective action be devised for SSES. When the particulars of this plan and milestones for its REGULATORY DOCKET Frig COPY OG PENNSYLVANIA POWER S LIGNY COMPANY

Mr. Boyce H. Grier March 2, 1979 completion have been established, the Commission will be advised immediately and a date for completing all necessary corrective action will be provided in a subsequent report(s).

Very truly yours, N. W. Curtis Vice President-Engineering & Construction ARS:mcb cc: Mr. Z. G. Davis (15)

Acting Director-Office of Inspection 6 Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. G. McDonald, Director (1)

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, Pennsylvania 18655