ML20080R011
| ML20080R011 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 10/12/1983 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20080R004 | List: |
| References | |
| NUDOCS 8310170301 | |
| Download: ML20080R011 (3) | |
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMEN 0 MENT NO. 17 TO FACILITY OPERATING LICENSE NPF-12 SOUTH CAROLINA ELECTRIC & GAS COMPANY SOUTH CAROLINA PUBLIC SERVICE AUTHORITY I.
INTRODUCTION Sy letter dated December 1,1982, the licensee indicated that our safety evalua-tion reports do not clearly reflect our acceptance of certain deviations from the 1
requirements of Appendix R pertaining to the need for automatic sprinkler protec-tion in areas which contain redundant shutdown systems.
Based on our review, we agree with the licensee that the list of acceptable deviations included in our SER Supplement 4 does not reflect our acceptance of sprinkler system deviation in our SER Supplement 3.
Therefore, this amendment corrects wording of a license condition relating to fire suppression to accu-rately reflect plant design.
II. DISCUSSION The appropriate paragraphs of Section 9.5.1 of the SER and the conclusions have been revised below to reflect the results of our evaluation of the sprinkler system deviations.
9.S Other Auxiliary Systems 9.5.1 Fire Protection System The automatic / manual sprinkler systems and the hose stations are connected to interior water supply headers. The interior water supply system is fed from two separate connections to the underground supply loop with appropriate valves to perfonn maintenance or to prevent a single break from impairing the entire distri-bution system. The water supply valves to the sprinklers are electrically super-vised with alarms in the control room. All other fire protection valves are con-trolled by a key locking procedure. Also, actuation of any water fire suppression j
system will cause a fire pump to start on a low header pressure signal. The low pressure alarm and a pump running signal indicate in the control room.
In addi-
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tion, the automatic sprinkler systems have water flow alarms which indicate in the control room. The automatic sprinkler systems, e.g., wet pipe sprinkler system, l
preaction sprinkler systems deluge, and water spray systems, are, or will be, l
designed to the requirements of National Fire Protection Association (NFPA) Stand-ard No.13, " Standard for Installation of Sprinkler Systems," and NFPA $tandard l
No.15, " Standard for Water Spray Fixed Systems."
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,y 73 2-The areas that are equipped with water suppression systems include the following:
Portions of the turbine building Control building - cable chase areas only Diesel generator cubicles Diesel fire punp room Drurming station and compactor arca (manual)
Auxiliary building - Zone 9, hallway, south end Reactor building purge exhaust system charcoal filter plenum (manual)
Reactor building charcoal cleanup system filter plenun (manual)
Auxiliary building charcoal exhaust system filter plenun (manual)
Fuel handling building charcoal exhaust system filter plenum (manual)
Control room energency filter plenum (manual)
Intermediate Building Fire area IB-9, chilled water pump roca Zone 5, general floor area Service water pump house Zone 2, operating flocr Fire area SWPH-4, ventilation equipment room The above list does not include the auxiliary building gas treatment filters listed in SER Supplement 3, because they are not installed at the Virgil C. Sumner fluclear Station. This is acceptable to the staff.
The in-situ and potential transient fire hazards for the remaining areas of the plant have been assessed against the requireme.nts for automatic sprinkler protec-tion stipulated in Section III.G of Appendix R.
The fire hazards in most of these areas are minimal. In the remaining areas (identified under " Fire Protection" for specific areas), the potential effects of a fire on safety related equipment have been reduced by encasing one redundant division in a 1 1/2-hour rated fire barrier.
Because of these conditions, plus the presence of area-wide fire detection systems and the availability of nanual fire fighting equipment, we conclude that the instal-lation of additional automatic sprinkler systems is not necessary. The existing fire protection provides us with reasonable assurance that one shutdown-related division will remain free of fire damage, and therefore, is acceptable.
III. EVALUATION Based on our evaluation, we conclude that the Fire Protection Program for the Virgil C. Summer Nuclear Station, with the accepted deviations listed below, meets the guidelines contained in Appendix A to BTP ASB 9.5-1, the technical requirenents of Appendix R to 10 CFR S0, and GDC 3, and is, therefore, acceptable.
Deviations:
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-3 b) Twenty-foot separation need not be maintained between heating, ventilation, and air conditioning system chilled water pumps.
c) Automatic fire suppression systems are required in the areas listed in Supplement No. 3 to the Safety Evaluation Report with the exception of the auxiliary building gas treatment filters.
d) No automatic fire detectors are required in the areas listed in Supplement No. 4 to the Safety Evaluation Report.
License Condition 2.C(18)a.(fii) will be changed to reflect deviation c) above.
This has been discussed with the licensee and is acceptable to South Carolina Electric and Gas Company.
IV.
ENVIRONMEllTAL CONSIDERATION We have deternined that the amendment does not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any signif-icant environmental impact. Having made this determination, we have further con-cluded that the amendment involves an action which is insignificant from the stand-point of environmental impact and, pursuant to 10 CFR 551.5(d)(4), that an environ-mental impact statement or negative declaration and environmental impact appraisal need not be prepared in connection with the issuance of this amendment.
V.
CONCLUSION We have concluded, based on the considerations discussed above, that: (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (2) such activities will be conducted in compliance with the Commission's regulations and the issuance of this amendment will not be inimical to the common defense and securit;y or to the health and safety of the public.
Principal Contributors: Jon B. Hopkins, Licensing Branch No. 4, DL Dennis J. Kubicki, Chemical Engineering Branch, DE Dated:
OCT 121983
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