PLA-1232, Forwards Results of Vacuum Breaker Performance Evaluation Providing Justification for Plant Operation Beyond Mode 3. Draft NEDE-22178-P, Mark II Containment Drywell-to-Wetwell Vacuum Breaker Models, Withheld (Ref 10CFR2.790)
| ML17139A924 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 08/13/1982 |
| From: | Curtis N PENNSYLVANIA POWER & LIGHT CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17139A925 | List: |
| References | |
| PLA-1232, NUDOCS 8208170248 | |
| Download: ML17139A924 (6) | |
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oj AOClBS SION NBR: 8208170248 DOC ~ DATE: 82/08/13 NOTARIZEDi NO DOCKET fACIL:50 387 'Susquehanna "S,team.Electric Station<
Unit 1< Pennsylva 05000387 50 388 Susquehanna
'Steam Electric Stationi Unit 2i Pennsylva 05000388 AUTH,NAME AUTHOR AFFILIATION CURTIS'
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Pennsylvania Power 8 Light Co ~
9EC IP ~ NAME RECIPIENT AFFILIATION SCHKENCERsA ~
Licensing Branch 2
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SUBJECT!
Forwards results of vacuum breaker per formance evaluation providing Justification for *plant operation beyond Mode 3, Draft NEDE 22178~Pi "Mark II Containment Drywell;to-Netwell Vacuum Breaker Modelsi"withheld (ref 10CFR2 ~ 790)
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~ 0 Pennsylvania Power 8 Light Company Two North Ninth Street
~ Allentown, PA 18101
~ 215/ 7705151 Norman W. Curtis Vice President-Engineering
& Construction-Nuclear 21 5 / 770-5381 AUG 13 1882 Mr. A. Schwencer, Chief Licensing Branch No.
2 U.S. Nuclear Regulatory Commission Washington, D.C.
20555 SUSQUEHANNA STEAM ELECTRIC STATION LICENSE CONDITION $116 WETWELL TO DR%ALL VACUUM BREAKERS (VB)
ER 100450 FILE 171-M-149 PLA-1232 Docket Nos.
50-387 50-388
Dear Mr. Schwencer:
As required by License Condition
- 7P16, please find attached the results of the vacuum breaker -performance evaluation which provides the information to justify plant operation beyond Mode 3 with the partially modified VB's.
The attached provides the following:
Attachment 1:
The VB forcing function during pool swell based on the 5.5 PSID uplift differential pressure specified by GE. :
GE Report No. NEDE-22178-P entitled "Mark II Containment Drywell~o'Petwell Vacuum Breaker Models."
Due to schedule restraints, the attached report represents the final draft report.
The technical content of the draft and final report will be identical, and will only differ in that the final report will be the printed and bound version.
Section 3.0 gives the description and verification of the VB dynamic model used to predict the VB impact velocities. :
CDI Report No. 82-4 entitled "Mark II Primary Con-tainment Vacuum Relief Valve Test Program Phase IV." This report documents the impact velocities used in the Phase IV tests based on the single bar linkage and the VB response model described in Attachment 2, and presents the results of the Phase IV tests.
These tests indicate that the'artially modified SSES VB is functionally qualified to the pool swell actuation load.
8208l70248 820813 PDR ADOCK 05000387 P
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AUG 13 1982 Page 2
SSES PLA-1232 ER 100450 File 171-M-149 Hr. A. Schwencer The above documents the information requested by your staff during the July 15, 1982 Hark II/NRC meeting.
Very truly yours, N. W. Curtis Vice President-Engineering
& Construction-Nuclear PAF/mks cc:
Farouk Eltawalia NRC (w/a)
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