ML20237A309

Notice of Violation from Insp on 980606-24.Violation Noted: Defective Equipment in Supply Circuit Breaker of Load Ctr 124B Not Identified & Corrected & on 980322 Breaker Tripped Unexpectedly & de-energized All Loads Supplied by Center

ML20237A309
Person / Time
Site:	Limerick
Issue date:	08/07/1998
From:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
Shared Package
ML20237A307	List: IR 05000352/1998005 ML20237A305 ML20237A309
References
50-352-98-05, 50-352-98-5, 50-353-98-05, 50-353-98-5, NUDOCS 9808130264
Download: ML20237A309 (2)

Text

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NOTICE OF VIOLATION PECO Energy Docket Nos. 50-352;50-353 Limerick Generating Sthtion Units 1&2 License Nos. NPF-39; NPF-85 During an NRC inspection conducted between June 1,1998, and June 24,1998,a violation of NRC requirements was identified, in accordance with the General Statement of Policy and Procedure for NRC Enforcement Actions, NUREG-1600,the violation is listed below:

A. 10 CFR 50, Appendix B, Criterion XVI, requires, in part, that: " Measures shall be established to assure that conditions adverse to quality, such as failures, malfunctions, deficiencies, deviations, defective material and equipment and nonconformances are promptly identified and corrected."

Contrary to the above, the following conditions adverse to quality were not promptly identified and corrected.

1. Defective equipment (an incorrectly wired current transformer) in the supply circuit breaker of load center 124B was not identified and corrected, and on March 22,1998 the breaker tripped unexpectedly and de-energized all the loads supplied by the load center. PECO was aware of potential wiring errors affecting the circuit breakers used at Limerick since November 1996 based on industry operating experience. PECO had failed to revise the periodic calibration procedure, which could have identified the incorrectly wired current transformers and prevented the event.

2. Deficiencies (age-related failures) in Agastat relays in three panels (OA, OB, j and OC-C124) were not identified and corrected. Due to higher panel l temperatures, the continued use of these Agastat relays beyond their appropriate service life led to higher age-related failures, including the April 4,1998, event in which the B train of the control room emergency fresh air supply (CREFAS) system did not actuate. On June 19,1998, several such relays remained in service, considerably beyond their calculated service lives.

This is a Severity Level IV Violation (Supplement 1).

l Pursuant to the provisions of 10 CFR 2.201, Philadelphia Energy Company is hereby )

required to submit a written statement or explanation to the U.S. Nuclear Regulatory Commission, ATTN: Document Control Desk, Washington, D.C. 20555 with a copy to the Regional Administrator, Region I, and a copy to the NRC Resident inspector at the f acility that is the subject of this Notice, within 30 days of the date of the letter transmitting this Notice of Violation (Notice). This reply should be clearly marked as a " Reply to a Notice of Violation" and should include for each violation: (1) the reason for the violation, or, if contested, the basis for disputing the violation or severity level, (2) the corrective steps that have been taken and the results achieved, (3) the corrective steps that will be taken to avoid further violations, and (4) the date when full compliance will be achieved. Your response may reference or include previous docketed correspondence, if the correspondence adequately addresses the required response. If an adequate reply is not 1 9808130264 980807 PDR ADOCK 05000352

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received within the time specified in this Notice, an order or a Demand for Information may be issued as to why the license should not be modified, suspended, or revoked, or why such other action as may be proper should not be taken. Where good cause is shown, consideration will be given to extending the response time. j If you contest these enforcement actions, you should also provide a copy of your response to the Director, Office of Enforcement, United States Nuclear Regulatory Commission, Washington, DC 20555-0001.

Because your response will be placed in the NRC Public Document Room (PDR), to the extent possible, it should not include any personal privacy, proprietary, or safeguards information so that it can be placed in the PDR without redaction, if personal privacy or proprietary information is necessary to provide an acceptable response, then please provide j a bracketed copy of your response that identifies the information that should be protected 1 and a redacted copy of your response that deletes such information. If you request withholding of such material, you must specifically identify the portions of your response that you seek to have withheld and provide in detail the bases for your claim of withhold-ing (e.g., explain why the disclosure of information will create an unwarranted invasion of personal privacy or provide the information required by 10 CFR 2.790(b) to support a request for withholding confidential conimercial or financial information). If safeguards information is necessary to provide an acceptable response, please provide the level of protection described in 10 CFR 73.21.  ;

Dated at King of Prussia, Pennsylvania this 7th day of August,1998 l

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