ML20078M477
| ML20078M477 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 10/21/1983 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20078M461 | List: |
| References | |
| NUDOCS 8310250200 | |
| Download: ML20078M477 (2) | |
Text
c
/
e UNITED STATES c( h NUCLEAR REGULATORY COMMISSION 7
y9%2']aC WASHINGTON, D. C. 20S55 w....-
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 76 TO PROVISIONAL OPERATING LICENSE NO. DPit-19 AND AMENDMENT NO. 67 TO FACILITY OPERATING LICENSE N0. DPR-25 COMMONWEALTH EDIS0N COMPANY DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 DOCKET N0s. 50-237 AND 50-249
1.0 INTRODUCTION
On June 13, 1983, Comonwealth Edison Company (CECO) proposed amendments to Appendix A of Operating Licenses DPR-19 and DPR-25.
The proposal requested extended time limits for the inoperability of the ECCS ring header snubbers.
The period of inoperability of the snubbers for Dresden Unit 2 was recuested to be ninety days after the amendment issuance and for Unit 3 the period would extend to December 30, 1983 or ninety days af ter the amendment issuance, whichever is later.
In addition, the proposal updated, for Dresden Unit 3 only, Tables 3.6.la and 3.6.lb to reflect changes in the type of snubbers (mechanical or hydraulic) already installed.
A Notice of Consideration of I suance of Amendment to Licenses and Proposed No Significant Hazards Consideration Determination and Opportunity for Hearing related to the requested action was published in the Federal Register on July 26,1983 (48 FR 33948).
No request for hearing was received and no comments were received.
2.0 EVALUATION There are six pairs of snubbers attached to the torus ring header in both Dresden Station Units.
Amendments 47 and 41 to the Technical Specifications for Units 2 and 3, respectively, were approved by the staff on February 1,1980. These amendments permitted either every other pair of snubbers (up to three pairs) or one snubber in each of the six pairs of snubbers to remain inoperable at the same time until September 1,1980. The amendments also permitted reactor startup with snubbers inoperable as previously described during the sane time period.
These amendments were requested to enable both plants to perform the construction work to change the existing 20 kip hydraulic snubbers to 35 kip mechanical snubbers. However, the proposed modifications have not yet been completed.
Amendments 47 and 41 were originally approved because analysis indicated that stresses in the torus ring header are below code allowables under 8310250200 831021 PDR ADOCK 05000 P
m
.' normal operating loadings plus operating basis earthquake (0BE) or safe shutdown earthouake (SSE) without snubber protection.
The above men-tioned analysis is still valid and the staff concludes that the proposed amendments should be approved so that the modification work can be completed.
The staff also finds acceptable the proposed updating of Tables 3.6.la and 3.6.lb in the Dresden Unit 3 Technical Specifications so that changes already made in the type of snubbers installed can be properly documented.
3.0 ENVIR0fMENTAL CONSIDERATION The staff has determined that the. amendments do not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any significant environmental impact.
Having made this determination, the staff further concludes that the amendments involve an action which is insignificant from the standpoint of environ-mental impact and, pursuant to 10 CFR 51.5(d)(4), that an environmental impact statement, or negative declaration and environmental impact appraisal, need not be prepared in connection with the issuance of these amendments.
4.0 CONCLUSION
The staff has 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 these amendments will not be inimical to the common defense and security or to the health and safety of the public.
5.0 ACKNOWLEDGEMENTS The following staff members contributed to this evaluation:
H. Shaw R. Gilbert Dated:
Oct6ber 21, 1983
--