ML20086A461
| ML20086A461 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 10/31/1991 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20086A458 | List: |
| References | |
| GL-90-09, GL-90-9, NUDOCS 9111190150 | |
| Download: ML20086A461 (2) | |
Text
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o UNITED STATES -
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NUCLEAR REGULATORY COMMISSION n
.r-WASHINGTON, D. C. 20s55 i,, g
- SAFETY EVALUATION BY=THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMEN 0 MENT NO.148 TO FACILITY OPERATING LICENSE NO. OPR-46 i
NEBRASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION DOCKET NO. 50-298 LO INTRODUCTION 1
By_ letter. dated August.5, 1991,-Nebraska Public Power District (the licensee) proposed changes to the Technical Specifications (TS) for Cooper Nuclear
-Station'(CNS).
It is proposed to remove the' snubber visual examinations schedule in the existing ~TS:and replace it with a refueling outage based visual examination schedule, Table 1 of Generic Letter 90-09 dated December 11, 1991, to.all' holders of operating licenses or construction permits for nuclear power reactors.
2.'O-EVALUATION
.The-snubber visual examination schedule in the existing TS 4.6.H is based on the permissible number _of inoperable snubbers found during the v_isual examina-1 tion.
Because the existing snubber visual examination schedule is based only on the absoluteEnumber of inoperable snubbers found during the visual examina-tions irrespective of the'. total population of snubbers, licensee's with a large
- snubber population find the visual examination schedule ex'cessively restrictive.
..The_ purpose of the alternative visual examination schedule is to allow the licensee to perform visual examinations and' corrective actions during plant 4
outages without-reduction of the confidence level provided by the existing
- visual examination schedule.
The new visual examination schedule specifies the
< permissible. number of inoperable snubbers for various_' snubber populations.
The basic examination interval is _the normal. fuel cycle up to 24 months.
This interval may be extended to as long as twice the fuel cycle or reduced.to as b
Lsmall as two-thirds of the fuel cycle depending on the number of unacceptable snubbers found during the visual examination.
The examination interval may
^
Evary by -/+-25 percent to coincide with the actual outage.
In the event one or more snubbers are found inoperable during a visual 1
Lexamination, the Limiti.ng Conditions for Operation (LCO) in the present TS require the licensee to restore or replace the inoperable snubber (s) to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or declare the attached system inoperable and ifollow the appropriate action statement for that system.
This LC0 will remain
_ in the TS however the permissible number of inoperable snubber (s) and the subsequent visual examination interval will now be determined in accordance with the new visual examination schedule (Table 1 of Generic _ Letter 90-09 dated December 11,1991).
As noted in the guidance for-this line item TS r
imorovement, certain corrective actions may have to be performed depending on 9111190150 911031
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. actinns and evaluations associated with the use of visual examination schedule and stated in the footnotes-1 thru 6, (Table 1 of Generic Letter 90-09) shall be included in the TS.
The staff has made two editorial changes to the existing technical pecifications to clarify their intent and to conform to the proposed wording of the model specification provided with Generic Letter 90-09. The word "or" on page 137b was changed to "and," and the words "and/or" on page 152 were changed to "and."
These changes were discussed with representetives of the licensee and found acceptable.
The licensee has proposed changes to TS 4.6.H that are consistent with the guidance provided in Generic Letter 90-09 for the replacement of the snubber visual examination schedule with Table 1 (including footnotes 1-thru 6) of the Generic Letter 90-09. On the basis of its review of this matter, the staff finds that the proposed changes to the TS for CNS are acceptable.
3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the Nebraska State official was notified of the proposed issuance of the amendment. The State official had no comment.
4.0 ENVIRONMENTAL CONSIDERATION
The amendment changes 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 changes in surveillance requirements. The NRC staff has determined that the amendment involves 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 radiation exposure. The Commission has previously issued a pro-posed finding that the amendment involves no significant hazards consideration and there has been no public comment on such finding (56 FR 43810).
Accordingly, the amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR Section 51.22(c)(9). Pursuantto10CFR51.22(b) no environmental impact statement or environmental assessment need be p iated in connection with the issuance of the amendment.
5.0 CONCLUSION
The Commission 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, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense 4
and security or to the health and safety of the public.
5 Principal Contributors:
J. Rajan M. Sykes Date: Octobar 31, 1991 J
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