ML18153D186
| ML18153D186 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 11/20/1992 |
| From: | Buckley B Office of Nuclear Reactor Regulation |
| To: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| TAC-M84472, TAC-M84473, NUDOCS 9212070184 | |
| Download: ML18153D186 (4) | |
Text
e UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 2055!,;
Docket Nos. 50-280 and 50-281 Mr. W. L. Stewart Senior Vice President - Nuclear Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060
Dear Mr. Stewart:
November 20, 1992
SUBJECT:
PROPOSED REVISION TO TECHNICAL SPECIFICATION BASES FOR SURRY POWER STATION, UNITS I AND 2 - OPERATION OF THE AUXILIARY VENTILATION SYSTEM (TAC NOS. M84472 AND M84473)
On September 4, 1992, Virginia Electric and Power Company requested the Nuclear Regulatory Commission's review and approval of proposed changes to the Technical Specification (TS) Bases for the Surry Power Station, Units 1 and 2.
Specifically, your request involves a change to expand the description of the auxiliary ventilation damper alignment when a safety injection signal is received and fuel handling is in progress, and an administrative change to the definition of the term, "HEPA."
The staff's safety evaluations of January 17, 1984, and January 16, 1985, addressed the inclusion of the ventilation system requirements, and the evaluatiori of fuel hindling accident consequences.
However, the Basis of TS 3.22, Auxiliary Exhaust Filter trains did not include a discussion of the manual operation of the auxiliary ventilation system dampers for the containment and the fuel building when handling irradiated fuel that is being, or has been recently discarded from the reactor. Also, the phrase, "high efficiency particulate absolute {HEPA)" is being changed to "high efficiency particulate air {HEPA)." This change is considered administrative in nature and makes the TS Bases consistent with the terminology of Regulatory Guide 1.52.
The staff finds that the proposed changes do not represent an unreviewed safety question, -and finds them acceptable. The revised Bases page is enclosed.
~.
9212070184 921120 PDR ADOCK 05000280 p
PDR'_.. _
e Mr. W. November 20, 1992 Any questions pertaining to this matter can be directed to me *at (301) 504-1452.
Enclosure:
Revised Bases Page TS 3.22-2 cc w/enclosure:
See next page DISTRIBUTION
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NRC & Local PDRs POI 1-2 RF S. Varga G. Lainas H. Berkow B. Buckley D. Miller F. Rinaldi OGC C. Grimes, 11-E-22 L. Cunningham, 10-0-4 ACRS (10)
M. Sinkule, RII
- Previously Concurred OFC POI I-2/LA NAME Hana M DATE ll/cilJ /92 OFC SPLB~
NAME CMcCracken DATE 10/06/92 DOCUMENT NAME:
SU84486 Sincerely, Original signed by Bart C. Buckley, Project Manager Project Directorate II-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation D. Hagan, MNBB-3206 G. Hill (8) Pl-22 Wanda Jones, P-370 OPA OC/LFDCB 11/ 1iJ/92 11/2-D /92 POI I-1¥tfi'./JJ y
HBerkow 11/ 7,0 /92 OTSB" CGrimes 10/29/92
e Basts TS 3.22*2 The purpose of the filter trains located in the auxiliary building is to provide standby capability for removal of particulate and iodine contaminants from the exhaust air of the charging pump cubicles of the auxiliary building, fuel building, decontamination building, containment (during shutdown) and safeguards building adjacent to the containment which discharge through the ventilation vent and could require filtering prior to release. During normal plant operation, the exhaust from any one of these areas can be diverted, if required, through the auxiliary building filter trains remotely from the control room. The safeguards building exhaust and the charging pump cubicle exhaust are automatically diverted through the filter trains in the event of a LOCA (diverted on a safety injection signal). The fuel building exhaust and purge exhaust are aJigned to continuously pass through ttie filters during spent fuel handling.
When irradiated fuel is being handled, the system is manuaJly placed in aJignment to ensure the exhaust from the fuel handling areas passes through the filters. The automatic alignment feature of the ventilation system, which initiates on a safety injection signal, is defeated unress the fuel has decayed for a sufficient period of time such that the radiological consequences of a fuel handling accident would be acceptable without iodine filtration.
Defeating the automatic alignment feature requires that, in the event of a LOCA, manuaJ actions be taken to realign the ventilation.
system to the charging pump cubicles and safeguards areas following actions to secure fuel handling activities.
High efficiency particulate air (HEPA) filters are installed before the charcoal adsorbers to prevent clogging of the iodine adsorbers. The charcoal adsorbers are installed to reduce the potential release of radioiodine to the environment.
Corrected By Letter Dated November 20, 1992
Mr. W. L. Stewart Virginia Electric and Power Company cc:
Michael W. Maupin, Esq.
Hunton and Williams Post Office Box 1535 Richmond, Virginia 23212 Mr. Michael R. Kansler, Manager Surry Power Station Post Office Box 315 Surry, Virginia 23883 Senior Resident Inspector Surry Power Station U.S. Nuclear Regulatory Commission Post Office Box 166, Route 1 Surry, Virginia 23883 Mr. Sherlock Holmes, Chairman Board of Supervisors of Surry County Surry County Courthouse Surry, Virginia 23683 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation Post Office Box 1197 Richmond, Virginia 23209 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street N.W., Suite 2900 Atlanta, Georgia 30323 C.M.G. Buttery, M.D., M.P.H.
State Health Commissioner Office of the Commissioner Virginia Department of Health P.O. Box 2448 Richmond, Virginia 23218 e
Surry Power Station Attorney General Supreme Court Building 101 North 8th Street Richmond, Virginia 23219 Mr. M. L. Bowling, Manager Nuclear Licensing & Programs Innsbrook Technical Center Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060