ML19317F312
| ML19317F312 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 01/08/1973 |
| From: | Schwencer A US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Thies A DUKE POWER CO. |
| References | |
| NUDOCS 8001100682 | |
| Download: ML19317F312 (2) | |
Text
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UNITED STATES ATOMIC ENERGY COMMISSION
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WASHINGTON. Q.C. 10845 Docket Nos. 50-270 JAN 8 $73 and 50-287 Duke Power Company ATTN: Mr. Austin C. Thies Senior Vice President Production and Transmission 422 South Church Street P. O. Box 2178 Charlotte, North Carolina 28201 Gentlemen:
We, find that we need additional information to complete our review of
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your application for an operating license for the Oconee Nuclear Station, Units 2 and 3.
The epecific information required, which was discussed with you at an earlier meeting in November 1972, is described in the enclosure.
In order to maintain our licensing review schedule, we will need a completely adequate response by Pebruary 1, 1973. Please inform us within seven (7) days af ter receipt of this letter of your confirmation of the schedule or the date you will be able to meet.
Please contact us if you have any questions regarding the enclosed requests.
Sincerely, f f, d / W &
I A. Schwencer, Chief Pressurized Water Reactors Branch No. 4 Directorate of Licensing
Enclosure:
Request for Additional Information I
cc: William L. Porter, Esquire Duke Power Company P. O. Box 2178 422 South Church Street Charlotte, North Carolina 28201 8001100 [M 8
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REQUEST FOR ADDITIONAL INFORMATION OCONEE UNITS 2 AND 3 SUBCOMPARTMENT PRESSURE ANALYSIS 1.
Reanalyze the reactor cavity and steam generator compartments pressure response considering a homogeneous steam--water--air mixture with appropriate correlations for sonic flow through the vents. A vent discharge coefficient of 0.6 should be used, and reactor blowdown calculations should assume a discharge coefficient of 1.
2.
Describe the analytical model, including assumptions and appropriate bases, used in calculating the subcompartment pressure reponse.
3.
Provide the mass and energy blowdown rates as a function of time and location used in the analysis.
4.
Discuss the analyses used to justify that the break locations selected result in the highest calculated pressures.
Include a description of the correlations used for determining subcooled blowdown rates.
S.
Provide the results of an analysis of the effects of uplift forces on the reactor vessel for breaks within the reactor cavity.
6.
Provide the results of an analysis of the jet forces which can impinge on the reactor cavity and steam generator structures.
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