IR 05000334/1987010

Discusses Safety Insp Rept 50-334/87-10 on 870605-17 & Forwards Notice of Violation.Addl Violation of NRC QA Requirements Identified.Concerns Expressed That Design of Chlorine Detection Sys Was Inadequate

ML20236H240
Person / Time
Site:	Beaver Valley
Issue date:	07/30/1987
From:	Kane W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Carey J DUQUESNE LIGHT CO.
Shared Package
ML20236H243	List: IR 05000334/1987010 ML20236H253
References
EA-87-116, NUDOCS 8708050112
Download: ML20236H240 (3)

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JUL 3 01987 J Docket No. 50-334 License No. DRP-66 EA 87-1:6 Duquesne Light Company ATTN: Mr. J. J. Carey Senior Vice President Nuclear Group Post Office Box 4 Shippingport, Pennsylvania 15077 Gentlemen:

Subject: NOTICE OF VIOLATION (Inspection No. 50-334/87-10)

This refers to the NRC resident safety ir- .ction conducted on June 5-17, 1982 at the Beaver Valley Nuclear Power Stati , Unit Shippingport, Pennsylvani The inspection report was sent to you on vune 23, ;987. The inspection was conducted to review the circumstances associated with a violation of a tech-nical specification limiting condition for operation (LCO) which was identified by your staff and reported to the NR During the inspection, an additional violation of NRC Quality Assurance requirements was identified which contrib-uted to the violation of the LCO. On July 2, 1987, an enforcement conference was conducted with you and members of your staff ' discuss the violation, its causes, and your corrective action The violations are deicribed in the enclosed Notice. The first violation involved the inoperability of all three chlorine detection system The systems had been inoperable since initial installation in 1980 in that they would not have obtained a representative sample of control room intake air because of inleakage into the sampling line from adjacent spaces. In this condition, the chlorine detection systems would not perform their intended safety function of automatically isolating the ventilation system and placing the control room air circulation in a recirculation mode, in the event of tigh chlorine levels in the control room ventilation system intake ai The NRC recognizes that the safety significance of this condition was mini-mized by the fact that (1) the chlorine detectors would have sensed levels in the ventilation equipment room (which is part of the control room ventilation envelope) and been activated when overall chlorine concentration levels exceeded their trip setpoints and apparently prior to toxic concentrations reaching the control room operators; (2) procedures require, in the event of a high chlorine level, that a control room operator manually isolate the ventilation system and transfer circulation to the recirculation mode; and (3) the distance between the only plausible source of chlorine in the chlorination building and the control room air intake makes any significant chlorine intake unlikel i Nonetheless, the NRC is concerned that the design of these chlorine detection '

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systems was inadequate, and post-installation testing of the systems was not sufficient to detect this design error. As a result, the systems did not meet the configuration described in the FSAR in that the chlorine detectors would not have received a representative sample of the control room air intak These events demonstrate the importance of proper design and suitable testing when modifications are made at the facilit Therefore, although the violations described in the enclosed Notice have been classified in the aggregate at Severity Level IV in accordance with the

" General Statement of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C (Enforcement Policy) (1987), any similar violations in the future may result in additional enforcement actio You are required to respond to the enclosed Notice and, in preparing your )

response, you should follow the instructions specified in the Notic '

In your response, you should document the actions taken or planned to prevent recurrence. After reviewing your response to the Notice, including your pro-posed corrective actions and the results of future inspections, the NRC will determine whether further enforcement action is necessary to ensure compliance with NRC regulatory requirements.

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In accordance with 10 CFR 2.790, a copy of this letter and its enclosure will be placed in the NRC Public Document Roc The responses directed by this letter and the enclosed Notice are not subject to the clearance procedures of the Office of Management and Budget, otherwise required by the Paperwork Reduction Act of 1980, Pub. L. No. 96-51

Sincerely, William F. Kane, Director Division of Reactor Projects Enclosure: Notice of Violation cc w/ encl:

J. D. Sieber, Vice President, Nuclear H. M. Siegel, Manager, Nuclear Engineering Department C. E. Ewing, QA Manager W. S. Lacey, Plant Manager R. Druga, Manager, Technical Services R. Martin, Manager, Regulatory Affairs J. Crockett, Senior Manager of Nuclear Operations N. R. Tonet, Manager, Nuclear Engineering & Construction Unit Puolic Document Room (PDR)

Local Public Document Room (LPDR)

Nuclear Safety Information Center (NSIC)

NRC Resident Inspector Commonwealth of Pennsylvania 0FFICIAL RECORD COPY CP PKG DUQUESNE LIGHT CO. -

l 0003. /29/87

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Duquesne Light Company 3 bec w/ encl:

Region I Docket Room (with concurrences)

Management Assistant, DRMA (w/o encl)

Section Chief, DRP M. McBride, RI, Pilgrim F. Young, SRI, BV-2 P. Tam, LPM, NRR Robert J. Bores, DRSS SECY J. Taylor, DEDO J. Lieberman, OE W. Russell, RI T. Murley, NRR D. Holody, RI

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J. Goldberg, OGC l T. Martin, DEDR0 l Enforcement Directors RII-III Enforcement Officers RIV-V H. Wong, OE F. Ingram, PA J. Bradburne, CA

E. Jordan, AE00 B. Hayes, OI S. Connelly, OIA D. Nussbaumer, SLITP OE Files (3 copies = ltr hd)

EDO Rdg File DCS

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