ML20214Q270

Part 21 Rept Re Defective Interlock in Control Rods During Movement to Full Up Position.Initially Reported on 860915. Corrective Action Will Be Taken by Univ of Illinois & Univ of California at Irvine

ML20214Q270
Person / Time
Site:	University of California - Irvine, 05000356, University of Illinois
Issue date:	09/18/1986
From:	Dean R GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER
To:	Deyoung R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
REF-PT21-86-314-000 PT21-86-314, PT21-86-314-000, NUDOCS 8609240243
Download: ML20214Q270 (2)

Text

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G A Technologies Inc.

PO BOX 85608 SAN DIEGO CAUFORNIA 92138 (619) 455-3000 September 18, 1986 Mr. Richard De Young, Director Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Notification Required by 10CFR21 GA Technologies Inc. TRIGA Reactors

Dear Mr. De Young:

This notification concerns a defect in equipment supplied by GA Technologies Inc. and is provided in compliance with 10CFR21. Verbal notification was made to your Walnut Creek Office on September 15, 1986. The following information is provided in the format of 10 CFR21, 21.21(b)(3).

(i) Richard A. Dean GA Technologies Inc.

P.O. Box 856C8 San Diego, CA 92138 (ii) University of Illinois 216 Nuclear Engineering Laboratory Urbana, Illinois 61801 University of California Irvine Irvine, California (iii) GA. Technologies Inc.

TRIGA Reactor Division P.O. Box 85608 San Diego, CA 92138 (iv) The control systems on these TRIGA reactors have an interlock that is supposed to insure all control rods are in the down position before you can apply air to the fast transient rod in the steady-state mode.

This interlock can be defeated when the shim or safety rods are moved to their full "up" position.

8609240243 860915 6 PDR ADOCK 0500 S

10955 JOHN JAY HOPKINS DR , SAN DIEGO. CALIFORNIA 92121

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(v) GA obtained this information by telephone from Craig Pohlod of the University of Illinois on September 8, 1986.

(vi) There is one defective interlock in each of the above reactors.

(vii) Any corrective action will be taken by the University of Illinois and the University of California at Irvine.

(viii) GA Technologies will recommend a fix for this problem to each of the two reactor facilities.

If you wish additional information, please call Mr. Robert H. Chesworth at (619) 455-3580.

Very truly yours, i

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ichard I Dean Senior Vice President Reactor Programs cc: Mr. Robert Engelkon Regional Administrator U.S. Nuclear Regulatory Commission 1900 North California Blvd.

Walnut Creek, CA 94596