ML20040A313
| ML20040A313 | |
| Person / Time | |
|---|---|
| Site: | 05000561 |
| Issue date: | 12/27/1976 |
| From: | Parr O Office of Nuclear Reactor Regulation |
| To: | Suhrke K BABCOCK & WILCOX CO. |
| Shared Package | |
| ML111090060 | List:
|
| References | |
| FOIA-80-515, FOIA-80-555 NUDOCS 8201200749 | |
| Download: ML20040A313 (4) | |
Text
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Distribution:
Docket File D. B. Vassallo NRC PDR F. J. Williams I
bec:
J. Buchanan Local PDR N 0. Parr j
T. Abernathy LWR #3 File M. Cox peYoung M. Rushbrook R. gN 2 7 876 R. Heineman i
D. Ross Docket No. STN 50-561 J. Knight R. Tedesco H. Denton Babcock & Wilcox Company V. Moore ATTH: Mr. Kenneth E. Suhrke R. Vollmer Manager, Licensing M. Ernst P. O. Box 1260 W. Gamill Lynchburg, Virginia 24505 W. Mcdonald, MIPC ELD Gentimen:
IE (3)
ACRS (16)
REQUEST FOR INFORMATION As a result of our review of the Babcock & Wilcox Standard Safety Analysis Report BSAR-205, your response to certain additional requests for information is required. The specific infomation required is detailed in the 2nclosure. Your staff received these requests by telecopy on Decanber 10, 1976.
In order to maintain our licensing review schedule, we need your complete responses to the Enclosure items by January 15, 1977.
Please inform us within seven days after receipt of this letter of the date on which you plan to respond so that we may assess the impact on our schedule if necessary.
Please contact us if you have any questions.
Sincerely, g.;g,- U r.cd by.
O. D ;"
Olen D. Parr, Chief Light Water Reactors Branch No. 3 Division of Project Management
Enclosure:
Request for Additional Information E
cc: See next Page LWR #3 3_
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- TCox:ak @.. _.0 arr 12/43/76 12h3/76 8201200349 010403 NDh 30-515 PDR
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s Babcock & Wilcox Company DEC 27 m.
cc: Washington Public Power Supply System A1TN: Mr. J. J. Stein Managing Director P. O. Box 968 3000 George Washington Way Richland, Washington 99352 Mr. Robert Borstan Bethesda Representative Babcock & Wilcox' Nuclear Power Generation Division Suite 5515, 7735 Old Georgetown Road Bethesda, Maryland 20014 B. G. Shultz Project Engineer Stone & Webster Engineering Corp.
P. O. Box 2325 Boston, Massachusetts 02107 Mr. W. E. Kessler Camonwealth Associates, Inc.
209 East Washington Jackson, Michigan 49201 Robert J. Kafin, Esq.
115 Maple Street Glen Falls, New York 12801 Mr. B. M. Miller Ohio Edison Company 76 South Main Street Akron, Ohio 44308 t
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ENCLOSURE i
REQUESTS FOR ADDITIONAL INFORMATION BSAR-205 DOCKET NO: STN 50-561 220.0 ANALYSIS 222.18 Table 15.1.14-2B showing steam line break mass and energy release data contains entrained liquid and is not consistent with the answer to question 222.11 (3). Please correct this table.
222.19 The Dittus-Boelter forced convection correlation is incorrectly applied to the condensing heat transfer which is described in the intact steam generator.
Provide analyses using an appropriate condensing heat transfer correlation for which you have provided justification.
222.20 Provide the detailed steam generator performance study which you reference in answer to question 222.11(1). Since this coefficient is multiplied by the flow before it is used in the TRAP code, the calculation will not be conservative for i
low flow rates. Provide analyses for which you have included a justified minimum value of reverse heat transfer from the liquid in the intact steam generator to the tubes.
222.21 The homogeneous flow model using a zero bubble rise velocity which you use in the TRAP code may not be conservative for analysis of small breaks requested by staff question 022.7.
For these break sizes a portion of the steam generator tubes may remain uncovered during the transient causing additional i
l superheating of the steam leaving the break, l
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221.21(continued) l Isentropic compression of this superheated steam within the
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containment may produce higher containment temperatures than would be obtained using the saturated steam assumed in the homogeneous model. Provide justification that the homogeneous flow model used in the TRAP code is conservative I
for small break sizes.
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