ML20209J152
| ML20209J152 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 01/29/1987 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20209J149 | List: |
| References | |
| NUDOCS 8702060226 | |
| Download: ML20209J152 (3) | |
Text
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h UNITED STATES
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NUCLEAR REGULATORY COMMISSION D
-E WASHINGTON, D. C. 20655 h
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SAFETY EVALUATION RY THE OFFICE OF NUCLEAR REACT 0D. REGULATION RELATEn TO AMEN 0 MENT Nn. 21 TO FACILITY OPFRATING LICENSE NPF-35 AND AMENDMENT NO. 11 TO FACILITY OPERATING LICENSE NPF-57 CATAWRA NUCLFAR STATION,IINITS 1 AND 7 DUKE POWER COMPANY, ET AL.
INTRODUCTION By [[letter::05000413/LER-1986-020, :on 860310,both Trains of Turbine Trip on Reactor Trip circuitry,hi-hi Steam Generator Water Level & Safety Injection Circuits Inoperable.Caused by Blown Fuse & Loose Wire.Fuse Replaced.Wire Tightened|letter dated April 9,1986]], Duke Power Company, et al., (the licensee) proposed a change to Technical Specification (TS) Table 3.3-6, Table Notations, The iune 5 and September 2, l
for Catawba Nuclear Station, Units 1 and 2.
1986, letters clarified the TS change request which would allow the alarm / trip setooint for the containment radiation monitor EMF-39 to be set and ad.iusted based upon activity inside containment.
EVALUATION The setpoint for radiatioh monitor EMF-39 serves 3 different purposes in different mcdes of operation. The existing requirements, as established by the triple asterisk notation of TS Table 3.3-6, do not clearly distinguish between these various purposes. As a consequence, it creates significant operational problems without commensurate safety benefits. The licensee proposes to change the notation to address the operational functions of EFF-39.
When containnent is being purged or vented to the atmosphere the purpose of EMF-39 is to automatically isolate the system if the release rate is too high.
The regulations require the licensee to keep concentrations of radioactivity at the site boundary from exceeding the values in 10 CFR 20 Appendix B, Table 2, Column 1, For Catawba this requirement is established by TS 3.11.7.1.
Accordinoly, the first sentence of the revised notation would explicitly require that the setpoint meet this requirement during purging or venting.
When the containment is not being purged or vented to the atmosphere, monitor EMF-39 serves one of the two other purposes, deoending on the operating mode.
During modes 5 and 6, FMF-39 provides personnel radiation protection. Thus, the second sentence of the revised notation establishes the alam setooint at 5 mR/hr in these operatina modes. During modes 1 through 4 the purpose of EMF-39 is to support the leakage detection program. For this purpose interest is in changes in radiation level frather than some predetermined value).
Therefore, the third sentence in the revised notation establishes the alarm setpoint at 3 times the previous reading during Modes 1 through 4.
The sta#f has reviewed this change and found it acceptable.
8702060226 870129 PDR ADOCK 05000413 P
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' ENVIRONMENTAL CONSIDERATION The amendments involve a change in the use of facility components located within the restricted area as defined in 10 CFR Part ?O and chanaes in requirements. The staff has determined that the amendments involve no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite and that there is no significant increase in individual or cumulative occupational exposures. The Commission has previously issued a proposed finding that the amendments involve no significant br ards consideration, and there have been no public comments on such finding. Accordingly, the amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR Section 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.
CONCLUSION The Commission made a proposed determination that the amendments involve no significant hazards consideration which was published in the Federal Register (51 FR 30565) on August 27, 1986, and consulted with the State of South Carolina. No public comments were received, and the state of South Carolina did not have any comments.
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 Contributors: Kahtan Jabbour, PWR#4/DPWR-A Charles Willis, PSB/DPWR-A l
Dated: January 29, 1987 l
I l
i DATED:
January 29, 1987 AMENDMENT NO. 21TO FACILITY OPERATING LICENSE NPF Catawba fluclear Station, Unit 1 APENDMENT NO.11TO FACILITY OPERATIfiG LICENSE NPF Catawba Nuclear Station, Unit ?
DISTRIBUTION:
Docket File 50-413/414 i
NRC PDR Local PDR PRC System NSIC PWR#4 R/F BJYoungblood R/F PTurcan KJabbour HThompson CGC-Eethesda JPartlow BGrimes EJordan LHarrer WJones TBarnhart (8)