ML20009A831
| ML20009A831 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 06/29/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20009A824 | List: |
| References | |
| NUDOCS 8107140310 | |
| Download: ML20009A831 (2) | |
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SAFETY ' EVALUATION BY~ THE'0FFICE OF-NUCLEAR REACTOR REGULATION 5 @ M
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RE'LATEU TO AMEND'ENT NO.~ -66'TO FACILTTY dPERATIN'G' LICENSE"N0'. DPR-3MNt.Y"^-
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AND AMENDMENT NO. 63 T0 FACILITY '~0PERdTII5TICENS'E' N0. DPR'-48 COMMONWEALTH EDIS0N COMPANY
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ZION STATION, UNITF 1 AND 2 DOCKET N05. 50-295 AND 50-304 ~ -
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Through letters dated ' March 4, and April 4,1977, and July 12, 1979, Commonwealth Edi~ son (the licensee) proposed amendments to Subsection 4.12.1.B.2 of the Tech-nical Specifications ~ for. Zion: Station, Unit Nos.1 and 2 (Zion 1/2).
In support ~
of the amendment, the licensee states that it is not technically feasible. to-meet the currently stated Lower Limits af Detection (glD) of release rates for.
gaseous effluents (10 uci/sec_ for noble gases and 10- uCi/sec for particulates)
~when the-" state of the art" LLDs in uCi/cc (the-Zion gaseous effluent monitorsM have. outputs calibrated in uCi/cc) are multiplied by the 'e~xtremely high-ventila
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' tion flow rates in cc/sec (maximum - 7 x 107 cc/sec).
For this reason,-the-~~
licensee requests approval to specify the gaseous effluent LLDs in uCi/cc con-
- sistent with the " state of the art" values for noble gases and particulates.y 2.0 Evaluation Based on our review and evaluation of the amendment, we {ind that the proposed and 10 gthe gaseous effluents at Zion 1/2, which is 10- uCi/cc for noble gases LLDs fo uCi/cc for particulates and iodine ara consistent with staff posi-tions on LLDs for gaseous effluenti as stated in Regulatory Guides 1.97, Rev. 2.
and 1.21 for noble gases, and NUREG-0472, Rev.
c, (July 1979) for particulate:
and iodine. We have determined that these limits are adequate to ensure the detection of release rates for gaseous effluents well below the limiting con-ditions for operation, as stated in the Zion Radiological Effluent Technical Specifications (RETS). We have also determined that the proposed :hange on
~ LLDs for the gasi.ous effluents does not' have any impact on our earlier conclu-sion that the licensee conforms to General Design Criteria 64 of-Appendix A.to _ _ -
10 CFR Part 50 which requires licensees to monitor releases of radioactivity..
from their facilities.
In vier of these considerations,-we find.the proposed
. amendment-ac.ceptabl e.
As a result of our telephone conversation with the
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licensee, however, it was mutually agreed that the Subsection 4.12.1.B.2 ofm the Technical Specifications should be reworded for consisMncy and clarity; These changes have been made in the Technical Specifications.
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TGWe also; reviewed: Subsection ~4~.121C.1 of'the. Technical:SpecificationsEforf:MC.
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WP :thisir'eview and :t'elephone; conversation with the licensee regarding Subsect'ionG 22~T 1
~W 4.12:1;C.1, it was mutually agreed-that this subsection should 'also'be.;rewordedf%~
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~for consistency and clarity.
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In view of the above considerations, we have concluded that the proposed
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am_endment to Section 4.12.of Zion 1/2 Technical Specifications,.as modified is acceptable.
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We have determined that the amendments do not authorize a change ~iheffluenti=-
types;or total amounts nor an increase in power leval and will not result in,_
any significant environmental impact. Having made.his determination, we have~ further concluded that the amendments involve an action which is insignif-icant: from the standpoint of environmental impact and, pursuant to 10 CFR ~
351.5(' )(4)~, that an environmental impact statement or negative ~ declarations d
and environmental impact appraisal need not be prepared in connection with the issuance of these amendments.
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Concl~usion'~
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We h' ave concluded,~ based on the considerations discussed above, that: '(1)
- because the amendments do not involve a significant increase in the proba-bility or consequences of accidents previously considered and do not involve a significant decrease in a safety margin the amendments do not involve a significant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (3) such activities will be conducted in compliance with i
the Commission's regulations and the issuance of these amendments will not be inimical to the common defense and security or to the health and safety of the public.
JUN 2 9~ 1981~
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