ML20198S241

SE Accepting Licensee Request for Deviations from Recommendations in Reg Guide 1.97,Rev 2 for Temp & Flow Monitoring Instrumentation for Cooling Water to ESF Sys Components & Containment Isolation Valve Position

ML20198S241
Person / Time
Site:	Millstone
Issue date:	10/31/1997
From:	NRC (Affiliation Not Assigned)
To:
Shared Package
ML20198S240	List: ML20198S237 ML20198S241
References
RTR-REGGD-01.097, RTR-REGGD-1.097 NUDOCS 9711140007
Download: ML20198S241 (4)

Text

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• f} NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. *a*** aaat k . . . . . /j SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO CONF 0RMANCE TO REGULATORY GUlDE 1.97. REVISION 2 FACILITY 0PERATING LICENSE NO. DPR-21 NORTHEAST NUCLEAR ENERGY COMPANY MILLSTONE NUCLEAR POWER STATION. UNIT 1 DOCKET NO. 50-245

1.0 INTRODUCTION

On April 24, 1991, the NRC staff issued a Safety Evaluation Report (SER) regarding Northeast Nuclear Energy Company's (the licensee) conformance to the guidance of Regulatory Guide (R.G.) 1.57 " Instrumentation for Light-Water-Cooled Nuclear Power Plants to Assess Plant and Environs Conditions During and following an Accident," Revision 2, for the Millstone Nuclear Power Station Unit No. 1. On December 30, 1993, the staff issued a Supplemental Safety Evaluation Report proposed deviations (SSER) on the same subject and accepted several licenseefrom to environmental qualification for temperature and flow instrumentation for cooling water to engineered safety features (ESF) system cnmponents.

Ih submittals dated October 5, 1995, and June 2, 1997, the licensee provided the additional information requested by the staff regarding the ESF cooling water instrumentation and documented additional deviations in the instrumentation that monitors containment isolation valve position.

2.0 EVALUATION R.G.1.97 recommends Category 2 instrumentation to monitor cooling water temperature to ESF system components. The licensee monitors cooling water temperature to ESF system components by monitoring emergency service water (ESW) temperature output from the low pressure coolant injection (LPCI) heat exchanger and turbine building secondary closed cooling water (TBSCCW) heat exchanger outlet temperature.

In the October 5,1995, submittal, the licensee stated that the TBSCCW heat exchanger temperature element does not meet C 4ategory 2 environmental qualification criteria of R.G.1.97. The* .W heat exchanger outlet temperature element is located in a mild er. ronment during post-accident conditions when the information from this instrumentation is provided to the operator. Since the TBSCCW heat exchanger outlet temperature element is located in a mild environment for the accident it is monitoring, Category 2 environmentally qualified instrumentation is not required. Therefore, the 971t140007 971031 PDR ADOCK 05000245 P PDR helosure

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existing TBSCCW heat exchanger outlet temperature instrumentation is '

acceptable.

R.G.1.97 recommends Category 2 instrumentation to monitor cooling water flow to ESF system components. The licensee monitors cooling water flow to ESF system components by monitoring ESW flow to the LPCI heat exchanger and TBSCCW pump discharge pressure.

In the October 5,1995, submittal, the licensee stated that the TBSCCW pump discharge pressure switch does not meet the Category 2 environmental qualification criteria of R.G.1.97 and committed to install an environmentally qualified TBSCCW pump discharge pressure switch. The licensee's commitment is acceptable.

R.G. 1.97 recommends Category 1 losition indication instrumentation for containment isolation valves. T1e licensee's position indication instrumentation for 16 containment isolation valves does not meet the Category I environmental qualification criteria. The affected isclation valves are:

the reactor water cleanup system bypass valve 1-CV-2A, control rod drive system scram discharge volume tank valves 1-SDV-IN,1-SDV-2N,1-SDV-IS, 1-SDV-25,1-SDV-3N,1-SDV-4N,1-SD'/-35, and 1-SDV-45, transverse in-core probe (TIP) system valves TIP-BV-1 TIP BV-2, TIP-BV-3, and TIP-BY-4, and shutdown coc'ing valves 1-SD-2A,1 SD-2B, and 1-SD-5. The reactor water cleanup system bypass valve and control rod scrau discharge volume control valves are (1) administrative 1y controlled, (2) closed on loss of air to the operator, and (3) are required to remain closed on an isolation signal. The TIP system valves and shutoown cooling system valves are (1) normally closed (2) administrative 1y controlled, (3) fail closed, and (4) are required to remain closed on an isolation signal. Since these valves are administrative 1y controlled, either fail closed or close on loss of air to the operator, and are required to remain closed during accident conditions, Category 1 position indication is not required, and therefore, this deviation is acceptable.

3.0 CONCLUSION

On the basis of the staff's review of the licensee's submittals, the staff finds that the licensee has provided adequate justification and commitment for deviations from R.G.1.97, Revision 2, for the environmental qualification of instrumentation that monitors temperature and flow for cooling water to ESF system components and classification of containment isolation valve position indication instrumentation at the Millstone Nuclear Power Station Unit No.1.

Therefare, the staff concludes that the licensee's post-accident monitoring instrumentation is acceptable.

Principal Contributor: B. Marcus Date: October 31, 1997

", Northeast Nuclear Energy Company Millstone Nuclear Power Station a

Unit I cc:

Lillian M. Cuoco. Esquire Mr. Wayne D. Lsnning Senior Nuclear Counsel Deputy Director of Inspections Northeast Utilities Service Company Special Projects Office P. O. Box 270 475 Allendale Road Hartford, CT 06141-0270 King of Prussia, PA 19400-1415 ,

Mr. Kevin T. A. McCarthy, Director Mr. F. C. Rotben Monitoring and Radiation Division Vice President - Work Services Department of Environmental Northeast Nuclear Energy Company Protection P. O. Box 128 79 Elm Street We+erford, CT 06385 Hartford, CT 06106-5127 Ernest C. Hadley, Esquire Mr. Allan Johanson, Assistant 1040 B Main Street Director P. O. Box 549 Office of Policy and Management West Wareham, MA 02576 Policy Development and Planning Division Mr. John Buckingham 450 Capitol Avenue - MS# 52ERN Department of Public Utility Control P. O. Box 341441 Electric Unit Hartford, CT 06134-1441 10 Liberty Square New Britain, CT 06051 '

Regional Administrator Region 1 Mr. David Amerine U.S. Nuclear Regulatory Commission Recovery Officer - Nuclear 475 Allendale Road Engineering and Support King of Prussia, PA 19406 Northeast Nuclear Energy Coupany P. O. Box 129 First Selectmen Waterford, CT 06385 Town of Waterford Hall of Records Mr. B. D. Kenyon 200 Boston Post Road President and Chief Waterford, CT 06385 Executive Officer Northeast Nuclear Energy Company Mr. D. M. Goebel P. O. Box 128 r .Vice President - Nuclear Oversight Waterford, Connecticut 06385 Northeast Nuclear Energy Company P. O. Box 128 Senior Resident Inspector Waterford, CT 06385 Millstone Nuclear Power Station c/o U.S. Nuclear Regulatory Mr. J. P. McElwain Commission Recovery Officer - Millstone Unit 1 P.O. Box 513 Northeast Nuclear Energy Company Niantic, CT 06357

-P. O. Box 128-Waterford, CT 06385 l

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Northeast Nuc16ar Energy Company Millstone Nuclear Power Station Unit 1  !

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The lionorable Terry Concannon Co-Chair Nuclear Energy Advisory Council Room 4035 Legislative Office Building Capitol Avenue Hartford, Connecticut 06106 Mr. Evan W. Woo 11acott Co-Chair Nuclear Energy Advisory Council 128 Terry's Plain Road Simsbury, Connecticut 06070 Citizens Regulatory Comission ATIN: Ms. Susan Perry Luxton 180 Great Neck Road '

Waterford, Connecticut 06385 Deborah Katz, President ,

Citizens Awareness Network P. O. Box 83 Shelburne Falls, MA 03170 Little Harbor Consultants, Inc.

Millstone - ITPOP Project Office P. O. Box 0630 Niantic, Connecticut 06357-0630 Mr. Daniel L. Curry Project Director Parsons Power Group Inc. '

2675 Morgantown Road Reading, Pennsylvania 19607 Mr. Don Schopfer Verification Team Manager '

Sargent & Lundy 55 E. Monroe Street Chicago, Illinois 60603

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