ML20237J806

Notice of Violation from Insp on 870601-05.Violation Noted: Lack of Proper Acceptance Criteria for Overcurrent Trip Devices for safety-related Breakers

ML20237J806
Person / Time
Site:	Maine Yankee
Issue date:	08/21/1987
From:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
Shared Package
ML20237J791	List: IR 05000309/1987012 ML20237J789 ML20237J806
References
50-309-87-12, NUDOCS 8708260325
Download: ML20237J806 (2)

Text

_

APPENDIX A NOTICE OF VIOLATION l

i Maine Yankee Atomic Power Company Docket No. 50-309 '

Maine Yankee Atomic Power Station License No. DPR-36 As a result of the inspection conducted on June 1-5, 1987, and in accordance with the NRC Enforcement Policy (10 CFR Part 2, Appendix C), the following l violations were identified:

A. 10 CFR 50, Appendix B, Criterion XI, requires that safety related components be tested in accordance with written test procedures which l

incorporate acceptance limits contained in applicable design documents. ,

Maine Yankee Operations QA Manual, Revision 3,Section XI, Paragraph 4b  !

requires all departments to be responsible for establishing test progra, s, 1 procedures and acceptance criteria.

Contrary to the above, as of June 2,1987, safety related overcurrent devices on 480 Volt buses 7 and 8 were tested in accordance with calibration procedure 5-77-3, Inspection and Repair of General Electric AK-2 circuit breakers, Revision 16, which did not incorporate acceptance limits contained in the design documents (Drawings 1150-E-54A dated March 29, 1970 and 0108-B-9487 dated October 15,1970).

This is a Severity Level IV violation. (Supplement I)

B. 10 CFR 50, Appendix B, Criterion VI, requires that drawings (documents) including changes are reviewed for adequacy and used at the location where the prescribed activity is performed. Maine Yankee Operations QA Manual, Revision 3,Section VI, Paragraph A, requires measures to review and control documents including revisions thereto.

Contrary to the above, as of June 2,1987, the following drawings were not revised to reflect the field installation in that:

a. Drawing 11550-FE*1H, 480V One Line Diagram Unit Substation, Sheet 1,  !

Revision 11.

1. Field installation of overcurrent devices in positions ISB, 15C, 150 on Bus 8 and positions 138, 13C, 130 on Bus 7 were rated 225 Amperes unlike the drawing representation of 250 Amperes.

2. The overcurrent device installed at position 160 on Bus 8 was rated 600 Amperes unlike the drawing representation of 350 Amperes.

OFFICIAL RECORD COPY IR MY 87 0003.0.0 8708260325 070821 08/05/87 PDR ADOCK 05000309 0 PDR

. i e

Appendix A 2 l

l

b. Drawing 1150-FE-1C, One Line Diagram-480V MCC-7A, 8A, and 13B, i Revision 20.

1. Field installation of moulded case breaker in position 2FBR was rated 15 Amperes unlike the drawing representation of 30 Amperes. ,

i

2. Field installation of moulded case breaker in position 5 RHR i was rated 20 Amperes unlike the drawing representation of 30 Amperes.

The lack of acceptance criteria for calibrating the overcurrent devices and the presence of overcurrent devices different than the plant design ,

drawing can potentially degrade the performance of the safety related  ;

buses.

This is a Severity Level IV violation. (Supplements)

Pursuant to the provisions of 10 CFR 2.201, Maine Yankee Nuclear Power Station  !

is hereby required to submit to this office within thirty days of the date of  !

the letter which transmitted this Notice, a written statement or explanation in reply, including: (1) the corrective steps which have been taken and the results achieved; (2) corrective steps which will be taken to avoid further i violations; and (') the date when full compliance will be achieved. Where good l' cause is shown, consideration will be given to extending this response time.

i f

1

]

l l

1 0FFICIAL RECORD COPY IR MY 87 0004.0.0 08/05/87 I

l .

. . . . .