ML20206M264
| ML20206M264 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 08/12/1986 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20206M261 | List: |
| References | |
| NUDOCS 8608200517 | |
| Download: ML20206M264 (2) | |
Text
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NUCLEAR REGULATORY COMMISSION
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4 WASHINGTON, D. C, 20555 1
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NOS. 99 AND 128 TO FACILITY OPERATING LICENSE NOS. DPR-71 AND DPR-62 CAROLINA POWER AND LIGHT COMPAN1 BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 i
DOCKET NOS. 50-325 AND 50-324
1.0 INTRODUCTION
By letter dated March 5,1986, as supplemented March 28, 1986 Carolina Power and Light Company transmitted a Technical Specification change request to Appendix A to operating Licenses DPR-71 and DPR-62.
The licensee proposed to modify the Limiting Condition for Operation (LCO) for the chlorine detection system (Brunswick Technical Specification Section 3/4.3.5.5 and its corresponding Bases Section). The proposed change reflects some recent modifications that have been made to' the control room isolation and alam features of the chlorine detection system at Brunswick Units I and 2.
2.0 EVALUATION The Bru m ick chlorine detection system consists of two independent subsystens, each containing two redundant chlorine detectors. These detectors are located at the control room air intake (1-AT-2977 and 2-AT-2977), and at the chlorine tank car s'iding (1-AT-2979 and 2-AT-2979). Detection of high chlorine concentrations (5 ppm of chlorine) by any of these detectors will actuate an alarm in the control room and autorr.atically isolate the control room outside makeup' air intake.
Neither the two subsystems, nor the two redundant chlorine detectors in each subsystem, are specifically identified in the current LCO.
Prior to the modification, the chlorine detectors installed at the tank car siding were not wired to detect a chlorine release.
Hence, they could neither alarm nor isolate the control room in the event of a chlorine release.
The modification involved wiring the detectors such that they could provide alam and isolation signals to the control room. The proposed amendment specifies the functioncl requirements for the chlorine detectors reflecting the above modifications made to the chlorine detection system.
Specifically, the proposed LCO action statement stipulates that with one chlorine detector of either or both subsystem (s) inoperable, the licensee is required to restore the inope.rable chlorine detector to operational status within 7 days.
If the detector is not operational after 7 days, then, ' ithin the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, the licensee should isolate the control w
room and operate the control room air cleanup system in the recirculation mode.-
This requirement is consistent with GE BWR/4 Standard Technical Specifications.
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The need to have remote chlorine detection and a related control room alarm and automatic control room isolation is based on the amount of onsite chlorine storage (55-ton capacity rail tank) and the distance between the chlorine tank and the control room outside air intake (450 feet) in accordance with the guidance provided in Regulatory Guide 1.95, Rev.1. "
Protectton of Nuclear Power Plant Control Room Operators Against an Accidental Chlorine Release". Hence, the LCO applies to all operational conditions whenever a chlorine tank car is within the Brunswick 1.
Exclusion Area.
3.0 EVALUATION
SUMMARY
On the basis of the above evaluation, we find that the requested amendment is an improvement in the functional requirements imposed on the installed as-built configuration of the chlorine detection system. The basis for our acceptance is that the proposed amendment is consistent with (1) the previously evaluated chlorine detection system described in the Brunswick FSAR, (2) the' guidelines in Regulatory Guide 1.95,
" Protection of Nuclear Power Plant Control Room Operators Against Accidental Chlorine Release", (3) the requirements in NUREG-0737, Item III.D.3.4, " Control Room Habitability Requirements", and (4) GE BWR/4 Standard Technical Specifications.
4.0 ENVIRONMENTAL CONSIDERATION
S The amendments change a requirement with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and change surveillance requirements. The staff has determined that the amendments involve no significant increase in the amounts, and no significant change in the types, of significant increase in individual or cumulative occupational radiation exposure.. The Commission has previously issued a proposed finding that the amendments involve no significant hazards consideration and there has been no public comment on such finding.
Accordingly, the amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9). Pursuant to 10 CFR 51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendments.
5.0 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 the amendments will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor: Jay Lee Dated:
August 12, 1986
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