ML17321A506
| ML17321A506 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 03/29/1985 |
| From: | Alexich M INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| AEP:NRC:0745U, AEP:NRC:745U, NUDOCS 8504040247 | |
| Download: ML17321A506 (7) | |
Text
REGULATOR INFORMATION DISTRIBUTION TEM (RIDS)
DOCKET ¹ 05000315 ACCESSION NBR 65000 f0207 DOC ~ DATE 85/03/29 NOTARIZED NO FACIL:50 315 Donald C ~
Cook Nuclear Power Pl anti Uni t 1i Indiana 8
AUTH,NAME AUTHOR AFFILIATION ALEXICH,M,P.
Indiana 8 Michigan Electric Co.
iRECIP.NAME RECIPIENT AFFILIATION E
DENTONiH ~ Re Office of Nuclear Reactor Regulationr Director
SUBJECT:
Discusses status of-K(Z) factor used in Exxon LOCA/ECCS evaluation model, Measured peak LHGR of Exxon Nuclear:
Co fuel approx 76/ of Tech Spec limits, DISTRIBUTION CODE~
AOOLD COPIES RECEI (ED LTR ENCL SIZE ~-
/'ITLE:
OR Submittal:
General Distr ibution NOTES OL:10/25/74 0500031'5 RECIPIENT ID CODE/NAME NRR ORB1 BC 01 INTERNAL'. ACRS 09 ELD/HDS3 NRR/DL DIR NRR/DL/TSRG, NRR/DSI/RAB RGN3 COPIES LTTR ENCL 1
1 1'1 RECIPIENT ID CODE/NAME ADM/LFMB NRR/DE/MTEB NRR/DL/ORAB TB 0'OPIES LTTR ENCL 1
1 1
1 1
,EXTERNAL: EG8G BRUSKEgS NRC PDR 02 LPDR NSIC 03
'05 TOTAL NUMBER OF COPIES REQUIRED:
LTTR 27 ENCL 4'
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INDIANA 8 MICHIGAN ELECTRIC COMPANY P,O. BOX 16631 COLUMBUS, OHIO 43216 AEP: NRC: 074 5U March 29, 1985 Donald C. Cook Nuclear Plant Unit No.
1 Docket No. 50-315 License No. DPR-58 STATUS OF K(Z) FACTOR USED IN EXXON LOCA/ECCS EVALUATIONMODEL Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555
Dear Mr. Denton:
This letter is submitted pursuant to discussions with your staff concerning the Exxon LOCA/HCCS Evaluation Model which supports the operation of Exxon Nuclear Company (ENC) fuel in the Donald C. Cook Nuclear Plant, Unit 1.
ENC has been evaluating the impact of'arious axial power shapes on the LOCA/ECCS analysis results for the D. C. Cook Unit 2 plant using their current Evaluation Model for 17x17 fuel.
Our initial review of the applicability of this issue to the current Cycle 8 operation of Unit 1 resulted in the conclusion that it should not be a concern because the Exxon fuel currently in the Donald C. Cook Nuclear Plant has high burnup and oper ates at low power.
At the present
- time, the measured peak Linear Heat Generation Rate (LHGR) of ENC fuel is about 765 (with penalties) of the current limit defined by the Technical Specifications.
Ne understand that this issue is currently under detailed review by your staff'nd by ENC.
As an additional precaution, we have applied the current Unit 2 K(Z) curve to Unit 1.
This has'been applied by administrative limit, which is similar to, but not the same as, that used for Unit 2.
Exxon has advised us of the methodology to be used for this application.
It is to be noted that Unit 1 of the Donald C. Cook Nuclear Plant, now completing Cycle 8, is scheduled for a refueling shutdown beginning approximately on April 5, 1985.
Based on our previous evaluation and recent communication with ENC, we believe that the Donald C. Cook Nuclear Plant is being operated in a safe and conservative manner.
8504040247 850329 I (Q PDR ADOCK 050003i5 P
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Mr. Harold R. Denton I
" AEP:NRC:07450 I
You should also note that we recognize that appropr iate,regulatory approval for the remaining 33 Exxon assemblies that w111 remain in Cycle 9 following the refueling will be required before we can )ustify the balance of the reload under the provisions of tOCFR50.59 as we or1ginally 1ntended.
Me will be in contact with your staff to determine the most expeditious manner by which this can be done.
This document has been prepared following Corporate procedures which incorporate a reasonable set of controls to insure its accuracy and completeness prior to signature by the unders1gned.
Very truly yours, M. P. Ale ieh Vice President MPA:wg
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Mr. Harold R. Denton AEP: NRC: 074 5U cc: John E. Dolan M. G. Smith, Jr.
Bridgman George Bruchmann R. C. Callen R. Charnoff NRC Resident Inspector - Bridgman G. F. Owsley, ENC - Richland, MA