ML20081D981

Part 21 Rept Re Faulty Valve Actuators.Initially Reported on 830908.Actuators Will Be Returned to BIF Valve Corp for Rework & Retest

ML20081D981
Person / Time
Site:	Hope Creek
Issue date:	10/06/1983
From:	Martin T Public Service Enterprise Group
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-84-143-000 PT21-84-143, PT21-84-143-000, NUDOCS 8311010417
Download: ML20081D981 (3)

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• Thomas J. Martin Public Service Electric and Gas Company 80 Park Plaza Newark, N.J. 07101 201/4306316 Vica President Engineering and Construction October 6, 1983 f

Dr. Thomas E. Murley, Administrator U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement .

Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Dr. Murley:

1 SIGNIFICANT CONSTRUCTION DEFICIENCY FAULTY VALVE ACTUATORS HOPE CREEK GENERATING STATION On September 8, 1983, a verbal report was made to Region I, 1 Office of Inspection and Enforcement representative,-Mr. E. C. I McCabe, advising of a potentially significant construction deficiency concerning the seismic test failure of BIF valves equipped with Xomox air operators. The following report is provided in accordance with the requirements of 10CPR50.55(e).

I By letter dated September 6, 1983, BIF Valve Corporation reported to the NRC in accordance with 10CFR21 that a Xomox supplied actuator had failed under seismic testing per IEEE ,

382-80. Twelve similarly equipped BIF valves had been shipped 1 to the Hope Creek jobsite pending successful completion of seismic testing. We consider this condition to be reportable in accordance with the previously submitted Part 21 report.

We have been informed that the details of the test failure were as follows. On August 26, 1983, a Matrix actuator - Model 33122SR80 - was under test at Wyle Laboratories, Alabama, in accordance with the seismic requirements of IEEE 382-80. The model analysis and plant-induced vibration testing had been completed with no failures on the actuator. The seismic tes' ting was started on this actuator-with the sine sweep tests (2H z to 33H z to 2Hz ) being performed on the. axis perpendicular 8311010417 3 m

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Dr. T. E. Murley 2 10/6/83 to the length of the spring cylinder. During this test, the actuator mounting bolts came completely out of the casting they thread into. At the time, this was attributed to possible loosening during the plant-induced vibration test. The four bolts were replaced and retorqued. The seismic test was then started over.

During the second try of seismic testing, the actuator was show-ing excessive twisting again. The test was stopped and the actuator was inspected. The items listed below are the problems which were found.

1. The actuator mounting bolts came loose; approximately a inch gap,

2. The copper air tubing running between the two cylinders broke off at both ends,

3. The spring return cylinder began to separate from the center body of the actuator, and

4. The lower brace bolts came loose.

At this point, the testing was stopped and was considered to be a failure.

During a meeting at BIF on September 19, 1983, Bechtel Power Corporation, our Architect / Engineer and Constructor, was informed of the proposed fix to the actuator which failed seismic testing.

The fix involves rework to the Matrix actuator mounting con-figuration to make the assenbly more rigid at the center body.

Also, the interior end plates on the two cylinders must be replaced with carbon steel so that stiffener plates may be welded to them, to achieve a more rigid assembly.

Bechtel has issued Nonconformance Report No. 2554 to control these valves. By October 14, 1983, they will be returned to BIF for rework and retest in accordance with the vendor's final Part 21 Report.

Very truly yours, A%&

e Dr. T. E. Murley 3 10/6/83 cc: Office of Inspection and Enforcement Division of Reactor Construction Inspection Washington, D. C.

NRC Resident Inspector - Hope Creek P. O. Box 241 llancocks Bridge, NJ 08038 u