ML20140D895
| ML20140D895 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 01/13/1986 |
| From: | Opeka J, Sears C NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| B11952, NUDOCS 8602030138 | |
| Download: ML20140D895 (3) | |
Text
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WEEE General Offices
- Seiden Street. Derlin. Connecticut EdES$.'d, [es P.O. BOX 270
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H ARTFORD. CONNECTICUT 06141-0270 L
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(20ams-so00 January 13, 1936 Docket No. 50-423 Bil952 Office of Nuclear Reactor Regulation Attn:
Mr. V. Noonan, Director PWR Project Directorate #5 Division of PWR Licensing - A U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Reference:
(1)
H. L. Thompson, Jr., letter to J. F. Opaka, Issuance of Facility Operating License NPF-44, Millstone Nuclear Power Station, Unit No. 3.
Dear Mr. Noonan:
Millstone Nuclear Power Station, Unit No. 3 Response to License Condition 9 In Reference (1), Northeast Nuclear Energy Company (NNECO) was granted an operating license for Millstone Unit No. 3.
In License Condition 9 NNECO was required to justify prior to completion of the start-up test program, the applicability of the Westinghouse LOFTRAN methodology described in WCAP-SS22-P-52 to the Model F steam generator. provides a justification for application of the Westinghouse LOFTRAN methodology, which is based on a Model 51 steam generator, to a Model F steam generator.
We believe that this information should satisfy the requirements of License Condition 9.
We remain available to discuss this issue with the Staff as necessary.
Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY et. al.
BY NORTHEAST NUCLEAR ENERGY COMPANY Their Agent b.
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J. F. Opeka Senior Vice President 0602030138 060113 6
PDR ADOCK 050004p3 P
PDR By: C. F. Sears
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Vice President
k STATE OF CONNECTICUT )
) ss. Berlin COUNTY OF HARTFORD
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Then personally appeared before me C. F. Sears, who being duly sworn, did state that he is Vice' President of Northeast Nuclear Energy Company, a Licensee herein, that he is aesthorized to execute and file the foregoing information in the name and on behalf of the Licensees herein and that the statements contained in said information are true and correct to the best of his knowledge and belief, h,,"
tT o ary Pu ic
. y Commis35n Expires March 31,1989
attachment 1 License Condition 9:
Mass and Energy Release Analysis (Section 6.2.1.4, SER, SSER 2, SSER 4)
Prior to completion of the start-up test program, NNECO shall justify the applicability of the Westinghouse LOFTRAN methodology to the Model F steam generator as contained in Topical Report WCAP-8822-P-S2 " Mass and Energy Releases following a Steamline Rupture."
Response
The results of superheat sensitivity analyses presented in WCAP-8822 Supplement 2 show that the addition of superheat has negligible impact on containment pressure and temperature for dry and subatmospheric containment designs. This result is due primarily to the following characteristics:
a)
Containment peak pressure and peak temperature are predominately affected by the total mass and energy release to the containment, and b)
The addition of superheat has no impact on steamline break mass releases and minimal impact on energy releases.
The characteristics above are independent of the steam generator type. Therefore, the results and conclusions of WCAP-8822-S2 are applicable to the Millstone Unit No. 3 Model F steam generators even though a Model 51 steam generator was utilized in the evaluation model for WCAP-8822-S2.
Therefore, the Westinghouse LOFTRAN methodology and the results presented in WCAP-8822 Supplement 2 are applicable to Millstone Unit No. 3.