ML19327B232
| ML19327B232 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 10/17/1989 |
| From: | Alexion T Office of Nuclear Reactor Regulation |
| To: | Schnell D UNION ELECTRIC CO. |
| References | |
| TAC-55207, NUDOCS 8910270221 | |
| Download: ML19327B232 (4) | |
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October 17, 1989 I
Docket No.
50-483 11STRIBUTI N:
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NRC & Local PDRs i
"PDl!!-3 r/f'*' JHannon l
JZwolinski PKreutrwr TAlexion 0GC-WF1 Mr. Donald F. Schnell EJordan BGrimes l
Senior Vice President - Nuclear ACRS(10)
PD!ll-3 Gray Files l
Union Electric Company Post Office Box 149 i
St. Louis, Missouri 63166
Dear Mr. Schnell:
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SUBJECT:
REQUEST FOR INFORMATION REGARDING STEAM GENERATOR TUBE 1
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RUPTUREANALYSIS(TACNO.55207)
J The staff is continuing its review of your steam generator tube ru$osure ture analysis and requests additioral information identified in the enc t
to continue its review.
J It is requested that you respond within 90 days of your receipt of this
- letter, I
This request for information affects fewer than 10 respondents; therefore OMB clearance is not required under Pub. L.96-511.
F Sincerely,
/s/
l Thomas W. Alexion, Project Manager i
Project Directorate 111-3 Division of Reactor Projects - III,
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IV, y and Special Projects l
Office of Nuclear Reactor Regulation i
Enclosures:
As stated cc: See next page l
Drol L
'f' DOCUMENT NAME:
55207 RAI Office:
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Surname:
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'8910270221 891017
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lt Mr. D. T. Schnell Callaway Plant Union Electric Company Unit No. 1 CC; Dr. J. O. Cermack Mr. Bart D. Withers CFA Inc.
President and Chief 4 Professional Dr., Suite 110 Executive Officer Gaithersburg, MD 20879 Wolf Creek Nuclear Operating Corporation Gerald Charnoff, Esq.
P. O. Box 411 Thomas A. Baxter, Esq.
Burlington, Kansas 66839 Shaw, Pittman, Potts & Trowbridge 2300 N Street, N. W.
Mr. Dan I. Bolef, President Washington, D. C.
20037 Kay Drey, Representative Board of Directors Coalition Mr. T. P. Sharkey for the Environment Supervising Engineer, St. Louis Region Site Licensing 6267 Delmar Boulevard Union Electric Company University City, Missouri 63130 Post Office Box 620 Fulton, Missouri 65251 l
l U. S. Nuclear Regulatory Commission l
l Resident Inspectors Office l
RRt1 l
Steedman, Missouri 65077 i
Mr. Alan C. Passwater, Manager Licensing and Fuels l
Union Electric Company i
Post Office Box 149 1
St. Louis, Missouri 63166 l
Manager - Electric Department Missouri Public Service Commission 301 W. High-Post Office Box 360 Jefferson City, Missouri 65102 I
Regional Administrator U. S. NRC, Region !!!
L 799 Roosevelt Road l
Glen Ellyn, Illinois 60137 I.
Mr. Ronald A. Kucera Deputy Director DepartmentofNaturalResources P. O. Box 176 Jefferson City, Missouri 65102
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i REQUEST FOR ADDITIONAL INFORMATION i
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During the conference call on August 2,198g, the staff indicated that the Iicensee's response of October 21, 1988 to the staff's request for information
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dated August 18, 1988 was incomplete f6r several reasons.
First, operator action time to initiate depressurization was not provided.
Second, the exact number of operators that participated in each of nine comonstration runs depicted in Table 2 of the licensee's submittal was unspecified. Third, the response times for operators did not provide sufficient assurance that they represented operators currently at the plant.
For these reasons, the l
licensee is requested to provide additional information regarding operator i
response times during a steam generator tube rupture (SGTR) at the Callaway Plant, Unit 1.
l The licenses should provide response times for the following actions:
i Identify and isolate ruptured steam generator.
i Operator action time to initiate cooldown.
Cooldown of reactor coolant system (RCS).
Operator action time to initiate depressurization.
Depressurization of RCS.
Operatoractiontimetoinitiatesafetyinjection(SI).
$1 termination and pressure equalization, e
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Assuming a simulated as-close-to-design basis-ss possible scenario, the l
licensee should provide operator response times (1) demonstrating that the SGTR event can be mitigated within a period of time compatible with l
overfill prevention and (2) assuring that response times are representitive of most, if not all, the operators currently at the plant.
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