ML20091F000
| ML20091F000 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 05/14/1984 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20091E985 | List: |
| References | |
| NUDOCS 8406010439 | |
| Download: ML20091F000 (2) | |
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NUCLEAR REGULATORY COMMISSION y
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 98 TO LICENSE NO. DPR-49 IOWA ELECTRIC LIGHT AND POWER COMPANY CENTRAL IOWA POWER COOPERATIVE CORN BELT POWER COOPERATIVE DUANE ARNOLD ENERGY CENTER DOCKET NO. 50-331 s
1.0 Introduction
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[ -By letter dated March 5,1984 (Ref.1) Iowa Electric Light and Power Company
.(the licensee) proposed a modification to the Technical Specifications for the Duane Arnold Energy Center (DAEC).
Changes were made necessary in
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order to specify the Maximum Average Linear Heat Generation Rate (MAPLHGR)
Y operating limits for both unpressurized and pressurized 8x8R fuel types s
gi beyond planar average exposures of 30,000 mwd /STU.
2.0 Evaluation The license's submittal provided MAPLHGR limits for fuel types (8D274L, 80274H and -8DPB289) in the Duane Arnold core. Although the methodology (Ref, 2) used is generically applicable for the determination of MAPLHGR limits, we previcusly concluded (Ref. 3) that the effects of enhanced fission gas release at high burnups (i.e., greater than 20,000 mwd /MtV) were not adequately considered in the analysis.
In response to this concern, the fuel vendor (General Electric) requested (Refs. 4-5) that credit for approved, but unapplied, ECCS evaluation model changes and calculated peak cladding temperature margin be used to avoid MAPLHGR
,i.W penalties at higher burnups. This proposal was found acceptable (Ref 6) provided that certain plant-specific analytical considerations were met.
The General Electric Standard Application for Reactor Fuel (GESTAR-II-Ref. 7) has been modified (Section S.2.5.2.5) to incorporate these considerations.
Based on our review of the licensee's proposal to extend the MAPLHGR limits for various fuel types present in the DAEC core, and based on our previous approval of the generic methods used to determine these limits, we find the proposed MAPLHGR limits acceptable.
3.0 Environmental Considerations We have determined that the amendment does 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
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'detennination, we have further concluded that the amendment involves
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, an action which is insignificant from the standpoint of environmental impact, and pursuant to 10 CFR 551.5(d)(4), that an environmental impact statement, or negative declaration and environmental impact appraisal need not be prepared in connection with the issuance of this amendment.
4.0 Conclusion 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 operat. ion in the proposed manner, and (2) such activities will be conducted in compliance with the Commission's regulations, and the issuance _of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
REFERENCES 1.
R.W. McGaughy (IEPLC) letter NG-84-1011 to H.R. Denton (NRC) on
" Extended Maximum Average Planar Linear Heat Generation Rate (MAPLHGR) i limits" dated March 5, 1984.
2.
"LOCA Analysis Report for Duane Arnold Energy Center," General Electric Company _ Report NED0-21082-02-1A (July 1977), Addendum 1 (January 1981).
3.
D.F. Ross, Jr. (NRC) letter to G. Sherwood (GE) dated January 18, 1978.
4.
R.E. Engel (GE) letter to T.A. Ippolito (NRC) dated May'6, 1981.
5.
R.E. Engel (GE) letter to T.A. Ippolito.(NRC) dated May 28, 1981.
6.
L.S. Rubenstein (NRC) memorandum for T.M. Novak'(NRC) on " Extension of General Electric Emergency Core Cooling System Performance Limits" dated June 25, 1981.
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7.
" General Electric Standard ' application for Reactor Fuel," General Electric-Company NEDE-24011-P-A-6, April 1983.
Principal Reviewer: J.C Vogelewede
_ Dated: May 14,1984 -
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