ML20035B167
| ML20035B167 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 03/26/1993 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 9303310276 | |
| Download: ML20035B167 (3) | |
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UNITED STATES
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\\,,,;,I v.a wn 25, 1993 Docket No. 50-339 Mr. W. L. Stewart Senior Vice President - Nuclear Virginia Electric and Pcwer Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060
Dear Mr. Stewart:
SUBJECT:
NOTICE OF ENFORCEMENT DISCRETION FOR VIRGINIA ELECTRIC AND POWER COMPANY (VEPCO) REGARDING THE NORTH ANNA POWER STATION, UNIT NO. 2 (NA-2)
By letter dated March 26. 1993 you requested relief from the required actions in the NA-2 Technical Specification (TS) 4.3.1.1.1, Table 4.3-1, Item 19.
Your staff informed the U.S. Nuclear Regulatory Commission (NRC) on March 25, 1992, at 1526 hours0.0177 days <br />0.424 hours <br />0.00252 weeks <br />5.80643e-4 months <br /> that NA-2 was not in compliance with TS 4.3.1.1.1, Table 4.3-1, Item 19 which requires that the manual Engineered Safety Features (ESF) functional input to the reactor trip instrumentation be verified operable every 18 months.
Your letter provided the following as justification for continued operation.
The circuitry is designed as a backup to the automatic reactor trip by safety injection signals and to the manual reactor trip circuitry.
Each of these primary methods for tripping the reactor has been completely and satisfactorily tested in accordance with the TS surveillance requirements.
Also, the testing satisfactorily completed for the manual safety injection circuitry for reactor trip was sufficient to assure that a reactor trip would be obtained even though all functions of the circuitry were not tested.
In addition, no credit is taken for the manual ESF functional test of the safety injection input to the reactor trip breakers in the plant's safety analysis.
The accident analysis and Emergency Operating Procedures (EOPs) require that the operator verify that a reactor / turbine trip has occurred before initiating a manual safety injection in the event of an emergency.
In the event of a failure of the reactor trip circuitry, the E0Ps do not utilize the safety injection-reactor trip signal.
The operators are directed to shut down the reactor by manually tripping the reactor using the reactor trip switch or by inserting the control rods.
Performing the testing at power is not practical because it would 1) render the manual safety injection capability and subsequent reactor trip inoperable and 2) cause an increased potential for an inadvertent reactor trip and safety injection due to the lifting of leads.
Based on our review of the situation and of your justification for continued operation without conducting the surveillance test at this time, we conclude that plant safety will not be unduly compromised and we are satisfied that such action is in the best interests of the public health and safety.
Therefore, it is our intention to exercise discretion not to enforce compliance with TS 4.3.1.1.1, Table 4.3-1, Item 19 until the staff can process Ol ffW W r in e r; mr
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March 26, 1993 a change to your TS on an emergency basis.
It is our understanding that you will submit the request for TS change by March 31, 1993.
This requested change to the TS will exciude the manual ESF functional test of the safety injection input to the reactor trip breakers until the next Unit 2 shutdown, but for a period not to exceed the remainder of the current Unit 2 operating cycle.
This decision does not preclude the liRC from considering enforcement action for the conditions that led to the need for this Notice of Enforcement Discretion.
Please notify me immediately if your understanding differs from that set forth above.
(Original Signed By)
Gus C. Lainas, Assistant Director for Region II Reactors Division of Reactor Projects I/II Office of Nuclear Reactor Regulation cc:
See next page Distribution Docket File NRC & Local PDRs PDll-2 RF TMurley/FMiraglia J. Partlow S. Varga G. Lainas H. Berkow E. Tana L. Engle OGC D. H3gan, MNBB 3206 G. Hill (2) Pl-37 (Docket f40. 50-339)
W. Jones, P-370 C. Grimes, ll/E/22 B. Boger, 10/H/5 ACRS (10)
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Mr. W. L. Stewart North Anna Power Station Virginia Electric & Power Company Units 1 and 2 cc:
Mr. William C. Porter, Jr.
Robert B. Strobe, M.D., M.P.H.
County Administrator State Health Commissioner Louisa County Office of the Commissioner P.O. Box 160 Virginia Department of Health Louisa, Virginia 23093 P.O. Box 2448 Richmond, Virginia 23218 Michael W. Maupin, Esq.
Hunton and Williams Regional Administrator, RII P.O. Box 1535 U.S. Nuclear Regulatory Commission Richmond, Virginia 23212 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323 Dr. W. T. Lough Virginia State Corporation Commission Mr. G. E. Kane, Manager Division of Energy Regulation North Anna Power Station P.O. Box 1197 P.O. Box 402 Richmond, Virginia 23209 Mineral, Virginia 23117 Old Dominion Electric Cooperative 4201 Dominion Blvd.
Glen Allen, Virginia 23060 Mr. M. L. Bowling, Manager Nuclear Licensing & Programs Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060 Office of the Attorney General Suprere Court Building 101 North Sth Street Richmond, Virginia 23219 Senior Resident inspector North Anna Power Station U.S. Nuclear Regulatory Commission Route 2, Box 78 Mineral, Virginia 231172
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