ML20028G994

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Forwards Safety Evaluation Re 10CFR50.59 Review of Two Control Rods Moving at One Time.Requires That Control Rod Selection Circuitry Be Revised at Next Refueling Outage to Prevent Withdrawal of Two Control Rods at One Time
ML20028G994
Person / Time
Site: Oyster Creek
Issue date: 10/02/1990
From: Dromerick A
Office of Nuclear Reactor Regulation
To: Fitzpatrick E
GENERAL PUBLIC UTILITIES CORP.
Shared Package
ML20028G995 List:
References
TAC-76424, NUDOCS 9010050073
Download: ML20028G994 (2)


Text

.

Octob3r 2, 1990 L

Docket No. 50-219 Mr. E. E. Fitzpatrick Vice President and Director Oyster Creek Nuclear Generating Station Post Office Box 388 Forked River, New Jersey 08731

Dear Mr. Fitzpatrick:

SUBJECT:

TWO CONTROL RODS MOVING AT ONE TIME - OYSTER CREEK NUCLEAR GENERATING STATION (TAC NO. 76424)

The staff has reviewed the GPU Nuclear Corporation's 10 CFR 50.59 evaluation of two control rods moving at one time and has audited the calculation supporting this evaluation.

Our Safety Evaluation is enclosed. While we have found the analysis to be correct, we don't consider reliance on operator action to meet the FSAR design basis for Chapter 15 rod withdrawal from low power and control rod drop safety analyses to be an adequate long term resolution to this problem. We find that the revised operating procedures provide adequate protection to allow continued operation of Oyster Creek for the remainder of the current cycle.

However, we require that the control rod selection circuitry be revised at the next refueling outage (13R) to prevent withdrawal of two control rods at one time.

We request that you respond within 30 days of receipt of this letter indicating you intent to comply with this requirement.

Sincerely,

/s/

Alexander W. Dromerick, Senior Project Manager Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation

Enclosures:

As stated cc w/ enclosures:

See next page DISTRIBUTION (Docket File J NRC & Local PDRs Plant File S. Varga (14E4)

B. Boger (14A2)

S. Norris A. Dromerick ACRS (10)

OGC G. Schwenk (8E23)

E. Jordan (MNBB 3302)

E. Wenzinger (RI)

/

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MEM0FSTOLZ, OYSTER CREEK 76424 Aqqne 9010050073 901002

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a Mr. E. E. Fitzpatrick Oyster Creek Nuclear Oyster Creek Nuclear Generating Station Generating Station ec:

Ernest L. Blake, Jr.

Resident Inspector Shaw, Pittman, Potts and Trowbridge c/o U.S. NRC 2300 N Street, NW Post Office Box 445 Washington, D.C.

20037 Forked River, New Jersey 08731 Commissioner I. H. Jolles, Executive Vice President New Jersey Department of Energy GPU Senior Corporation 101 Commerce Street 100 Interpace Parkway Newark, New Jersey 07102 Parsipanny, New Jersey 07054 Kent Tosch, Chief Regional Administrator, Region I New Jersey Department of Environmental U.S. Nuclear Regulatory Commission Protection 475 Allendale Road Bureau of Nuclear Engineering King of Prussia, Pennsylvania 19406 CN 415 Trenton, New Jersey 08625 BWR Licensing Manager GPU Nuclear Corporation 1 Upper Pond Road Parsippany, New Jersey 07054 Mayor Lacey Township 818 West Lacey Road Forked River, New Jersey 08731 Licensing Manager Oyster Creek Nuclear Generating Station Mail Stop:

Site Emergency Bldg.

P. O. Box 388 Forked River, New Jersey 08731

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