ML20090K107
| ML20090K107 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 03/11/1992 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20090K109 | List: |
| References | |
| NUDOCS 9203180273 | |
| Download: ML20090K107 (2) | |
Text
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR ~ REACTOR REGULATION RELATED TO AMENDMENT NO. 40-TO FACILITY OPERATING LICD4SE NO. NPF-53 THE CLEVELAND ELECTRIC ILLUMINATING COMPANY.-ET AL.
PERRY NUCLEAR POWER PLANT. UNIT NO. 1 DOCKET-NO. 50-440
1.0 INTRODUCTION
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_By letter dated December 18, 1991, the Cleveland Electric Illuminating Company (the licensee) requested an amendment to Facility Operating License No NPF-58 for the Perry Nuclear Power Plant, Unit 1.
The proposed amendment would-revise Technical' Specification (TS) 5.3.2 - Control Rod Assemblies 4-to Lprovide a more general design description, thereby allowing the licensee to install control rods of newer design that have been reviewed and approved for.
use by the NRC staff on a generic basis.
2.0: EVALUATION:
d The. proposed changes.to TS 5.3.2 would allow the use of hafnium. metal and/or boron carbide powder as the neutron absorbing control material (s) in the -
control rod assemblies.
The current wording allows only boron carbide powder.
In' addition,-_a nominal-absorber length _ of_143.7 inches -is specified _versus the current 1 statement that implies-that every individual tube will contain-that
'same length of absorber material (some designs approved by:the staff include tubes in a given control rod that do not contain the absorber material. for their full length).
Finally, the specific reference to the cruciform stain-lesststeelysheath would be-deleted,Las= not all-of the currently approved control rod'designssinclude a sheath.
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The' licensee intends to: install,several control ods containing hafnium during Lthe upcoming third refueling outage.
The use of hafnium does not
- significantlyjchange-the'neutronic or_ mechanical characteristics of the
' control rods,'and more recent designs have many advantages. -'These advantages include:-increased neutron absorbing material-for longer life, improved resistance to intergranular stress corrosion cracking,-and a reduction in the
- amount of radioactive cobalt released,into plant piping systems.
The proposed
-changes _ will not affect the-existing requirement.to have 177 cruciform-shaped control. rods: installed, nor the existing requirements for control rod scram insertion times and operability.
The control rods to be installed will be of a type.previously approved by the NRC staff and will be physically compatible
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withtheexisting-rod'dgsign.
The new design will be properly reflected:in
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the-licensee's reload _ analysis, which is performed using an NRC-approved-
- methodology Tand the' existing. margins of. safety will-be preserved'and-verified by the licensee iniaccordance'with the 10 CFR 50.59 review process.
Based on-theLabove discussion, the. staff finds the proposed changes to TS 5.3.2 to be acceptable.-
3.0:. STATE CONSULTATIOS;
-In accordance withithe_ Commission's regulations, the Ohio State official was notified _of;the proposed issuance _of the amendment.
The State official had no.
comments.
4 -;0 '
ENVIRONMENTAL CONSIDERATI0'N
- This amendment-involves a cha~ngef to a requirement with respect to the instal-
- lation-oriuse of a facility component located within the -restricted area as -
? defined. in 10.CFR Part; 20 orcaLchange Lto ~ a surveillance requirement. The staff
- has determined thatithe amendment-involves.no significant increase-in the l amounts, and no1significant1ch~angeLin:the:typescof;any. effluents that may be
= released offsite ^ andithat there Is"no ~significant' increase in individual-or cumulative. occupational radiation exposure.
The Commission 1has previously.
Lissued:a: proposed finding that this amendment!Involvesino significant hazards consideration and ;there' has been-no publict comment on such finding (57'FR'2601). Accordingly, this' amendment meets _the eligibility criteria for
' categorical (exclusion sottforth;in 10 CFRt51522(c)(9).
Pursuant to 10 CFR 51.22(b), no' environmental impactL statement or environmental assessment need t be prepared in connection.with the issuance.of-this amendment.
5.0.
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.The staff!has' concluded, based on the considerations discussed above, that:
-(l).'therenisireasonable-assurance that the health and' safety of the public
> will not:be endangered:byLoperation _in the proposed inanner, -(2) ruch activities:willibeLeonducted-fin' compliance with the Commission's regulations, Tand (3)lthe:issuancelof thisFamendment will not' beiinimica1Lto the common defense and security'or:to the health and safety. of the public.
i iPrincipal! Contributor:- J. R.. Hall
. t Date:%rch 11_, 1992 w
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