ML20070T087
| ML20070T087 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 02/02/1983 |
| From: | Eisenhut D Office of Nuclear Reactor Regulation |
| To: | COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML20070T090 | List: |
| References | |
| NUDOCS 8302080194 | |
| Download: ML20070T087 (4) | |
Text
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7590-01 l
UNITED STATES NUCLEAR REGULATORY COM11SSION In the flatter of
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COMMONWEALTH EDISON COMPANY
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Docket Nos. 50-237 and 50-249
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(Dresden Nuclear Power Station,
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Units Nos. 2'and 3)
)
EXEMPTION 1.
Commonwealth Edison Company (the licensee) is the holder of a Provisional Operating License No. DPR-19 and Facility Operating License No. DPR-25 which authorize operation of the Dresden Nuclear Power Station, Units 2 and 3, respectively (Dresden or the facilities). These licenses provide, among other things, that the facilities are subject to all rules, regulations and Orders of the Nuclear Regulatory Commission (the Commission) now or hereafter in effect.
The facilities are boiling water reactors located at the licensee's site in Grundy County, Illinois.
II.
Section III.G.3 of Appendix R to 10 CFR 50 requires, among other things, that a fire detection system and a fixed fire supprossion system shall be installed in the area, room or zone for which alternative safa shutdown capability has been provided.
The licensee, in a July 1,1982 submittal, requested exemptions for the following equipment.
1.
All panels located in the control room 2.
- s 23-1 and 24-1 4.
480V SFR's 28 and 29 8302000194 830202 DRADOCK05000g
7590-01 5.
480V MCC's 28-7 an'd 29-7
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6.
250V MCC's 2A and 2B 7.
125V Distribution Panels 2A and 2B 8.
- 10. 480V SWGR's 38 and 39
- 11. 480V MCC's 38-7 and 39-7
- 12. 250V MCC's 3A and 3B
- 13. 125V Distribution Panels 3A and 3B The licensee in the same submittal indicated the following as a basis for its exemption request:
All equipment requiring fixed suppression as defined in Section III.G.3 for which an exemption was requested is critical to the power distribution necessary for normal and emergency operation of safety related equipment for Units 2 and 3.
C The inadvertent actuation of any fixed water suppression system located over this power distribution equipment could result in the fault or failure of that equipment.
Installation of an.
type of fixed suppression system other than water, such as cardox, halon or foam, would be ineffective or inappropiate for the areas in which the equipment. listed above is located or for the type of fire likely to occur in the area. All such equipment is in high traffic areas which are currently provided with fire detection and manual suppression systems. Furthermore, the existing fire l
detection and suppression systems currently installed in the areas
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containing the equipment listed above have been reviewed and S
. approved by the NRC in the Dresden Station, Units 2 and 3 Fire m.
Protection SER. As the probability of inadvertent actuation of a
7590-01
. l fixed suppression system is of far greater magnitude than the probability of occurrence of a fire severe enough to require the use of the alternate shutdown method independent of the fire area, Commonwealth Edison feels that the installation of such fixed suppression systems would only result in a decrease in plant safety.
The NRC staff has evaluated the licensee's fire hazards analysis for.
these areas and has made the following determinations. All of the fire zones for which exemptions have been requested represent a similar configur-
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ation, i.e., combustible loading is light, there is alternate shutdown capability, smoke detection, and manual fire suppression equipment is available. There is, therefore, reasonable assurance that a fire in any of these areas would be promptly detected and extinguished. The'lo.w combustible loading in these areas ensures that safety related equipment in adjacent _ areas will not be threatened. The installation of a fixed fire suppression system will not significantly increase the level of fire protection in these areas.
l Based on our evaluation, described in Enclosure 2 to the letter transmitting this exemption, we find that the existing fire protection in conjunction with alternate shutdown capability in the areas for which an exemption has been requested provides a level of fire protection equivalent to the technical requirements of Section III.G.3 of Appendix R, and there-s, fore, the exemptions should be gr' anted.
7590-01 III.
Accordingly, the Commission has determined that, pursuant to 10 CFR 50.12, these exemptions are authorized by law and will not endanger life-or property or the common defense and security, are otherwise in the public interest, and hereby grants exemptions for the areas described in Section II above from that portion of Section III.G.3 of Appendix R which requires that a fixed fire suppression system shall be installed in the area, room or zone for which alternate safe shutdown capability has been provided.
The Commission has determined that the granting of this Exemption will.
not result in any significant environmental impact and that pursuant to 10 CFR $51.5(d)(4) an environmental impact statement or negative declaration and environmental impact appraisal need not be prepared in connection with s,
this action.
This Exemption is effective upon issuance.
FOR THE NUCLEAR REGULATORY COMMISSION f
Darre isenh ehtor Division of Licensing Dated 'at Bethesda Maryland this 2nd day of kebruary,1983 e
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