ML20080B353

Interim Deficiency Rept Rdc 77(83) Re MSIV Actuators Supplied by Ge.Initially Reported on 830708.Actuators Failed Qualification Testing to NUREG-0588 Criteria,As Result of Hardening of Lubricant,Inhibiting Mechanical Motion

ML20080B353
Person / Time
Site:	Perry
Issue date:	07/29/1983
From:	Edelman M CLEVELAND ELECTRIC ILLUMINATING CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
RTR-NUREG-0588, RTR-NUREG-588 10CFR-050.55E, 10CFR-50.55E, RDC-77(83), NUDOCS 8308050427
Download: ML20080B353 (2)

Text

.

, L-

~

, r-P O. box 5000 - CLEVELAND. OHIO 44101 - TELEPHONE (216) 622-9800 - lLLUMIN ATING BLDG. - 55 PUBLICSQUARE Serving The Best Location in the Nation MURRAY R. EDELMAN July 29, 1983 VICE PRESIDENT NUCUAR Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE: Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Main Steam Isolation Valves Supplied By The General Electric Company [RDC 77(83)]

Dear Mr. Keppler:

This letter serves as an interim report pursuant to 10CFR50.55(e) on the significant deficiency concerning the actuators on the Main Steam Isolation Valves (MSIV) supplied by the General Electric Company (GE) to the Perry Nuclear Power Plant. Mr. E. Riley of The Cleveland Electric Illuminating Company notified Mr. J. Konklin of your office of the potential significant deficiency on July 8, 1983.

This letter contains a description of the deficiency, planned corrective action, and the scheduled date for submittal of our next report on this subject.

Description of Deficiency The MSIV Actuator, Hiller /Sheffer SA-A034 supplied by GE, failed qualification testing to NUREG 0588. The MSIV was tested as a normal qualification function to evaluate the ability of the actuator to perform its safety-related function for PNPP's environments. The actuator was exposed to high levels of gamma radiation and temperatures which may exceed those to which the actuator would actually be subjected. This resulted in hardening of the lubricant which inhibited mechanical motion and in the deterioration of various Viton seals and o-rings causing hydraulic and pneumatic leakage.

Corrective Action The seals, o-rings and lubricant currently used in the actuator will be replaced with EPDM seals and o-rings, and DAG Dispersion #156 Lubricant.

These have a higher resistance to radiation exposure than the original seats, o-rings, and lubricant. In addition, the radiation exposure levels for the actuator are being re-evaluated. The rebuilt actuators will be retested to the recalculated parameters.

'y)0il o 1 s983 e308050427 830729 E06 PDR ADOCK 05000440 S PDR

l

. . Mr. Jrmen G. Kzppler July 29, 1983 s

The next report will be issued upon completion of the retest, which is currently scheduled for June 1, 1984.

Sincerely, Murray R. elman Vice President Nuclear Group MRE:pab cc: Mr. M. L. Gildner NRC Site Office Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C. 20555 Records Center, SEE-IN Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339

-rm--- , -,----w- .,wm,,,,,,.,.--,,,- ,,,m,,,,---.,ry,,,,,-,-