ML19256F526
| ML19256F526 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 05/17/1973 |
| From: | Mangelsdorf H Advisory Committee on Reactor Safeguards |
| To: | Ray D US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19256F505 | List: |
| References | |
| ACRS-1648, NUDOCS 7912190330 | |
| Download: ML19256F526 (2) | |
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.w ADVISORY COMMITTEE ON REACTOR SAFEGUARDS
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UNITED STATES ATOMIC ENERGY COMMISSION WASHINGTON.D.C. 2054s RAY 1 7 E U Honorable Dixy Lee Ray Chairman U. S. Atomic Energy Cosnission Washington, D. C.
20545
Subject:
REPOKI ON ZION STATION UNITS 1 AND 2
Dear Dr. Ray:
In our August 17, 1972 report on Zion Station Units 1 and 2, the Com-mittee recomended that the Regulatory Staff and the ACRS review, prior to operation of the plant at appreciable power, the applicant's proposals for operating power limits as related to the possible densification of fuel in the Zion reactors. In addition, the Committee recommended that operation not exceed 2760 Mw(t) (85 per cent of full power) until the first refueling of. Unit 1 and that the Regulatory Staff and the ACRS
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should review the matter prior to operation at higher power. The applicant has addressed the densification effects and has proposed an cxtended startup program. These matters were considered at a Subcom-mittee meeting held in Washington, D. 4., April 21,1973, and at the 157th ACRS meeting, May 10-12, 1973. During its review, the Comittee had the benefit of discussions with representatives of Comm.onwealth Edison Company, Westinghouse Electric Corporation, Sargent and Lundy, and the AEC Regulatory Staff. The Committee also had the benefit of the documents listed.
The extended startup program to acquire operating data and experience vill be initiated fc11owing satisfactory completion of preoperational testing. The ACRS concurs with the Regulatory Staff and the applicant on the general features of the power ascension program and the specific attention being given to in-core.nonitoring of the fuel rods. lloweve r,
tha Committ.ee reaffirms its recommendation that neither Unit i nor Unit 2 be operated at power levels greater than 85 per cent of full power until af ter the first refueling of Unit 1.
In addition, for une in establishing sui-ble limits on power for subsequent operation, acquisition of data. elating to fuC :,ehavior in both unien should he continued.during the entire period of operation prior to first re fue llny, of Unit 1 and the condition of the fuel in Unit I should be determined e.
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' norable Dixy Lee Ray
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at the ti e of the refueling outage. The Regulatory Staff and the ACRS should revir Any proposals for changes in maximum power levels during subnequer y,eration, taking into account also the progress made in the analytical and experimental developments for emergency core cooling systems and the implementation of the resolutions for generic items mentioned in previous ACRS reports.
Dr. Edward A. Mason did not participate in the Committee's review of this project.
Additional coments by Dr. W. R. Stratton and Dr. W. Kerr are presented below.
Sincerely yours,
}'
ijs..os. C f
r H. C. Mangelsdorf Chairman Additional Comment by Dr. W. R. Stratton and Dr. W. Kerr "We disagree with the position of the Committee that power levels above 857, should not be considered until after the first refueling of Unit 1.
We believe that it would be appropriate for the Regulatory Staff and the ACRS to consider the possibility of operation at higher power levels af ter a review of the operating experience and data acquired. during the augmented and extended startup program."
Re ferences 1.
Safety Evaluation of the Zion Nuclear Power Station Units 1 & 2 USAEC/DL, October 6, 1972.
2.
Amendments 22-27 to the Zion Station FSAR.
2.
Directorate of Licensing letter to ACRS Chairman,* dated April 10,
' O, 1973 and attachments.
1624 607-gg A-u3