ML17317B420
| ML17317B420 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 07/13/1979 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7908100360 | |
| Download: ML17317B420 (6) | |
Text
JUL
~ 3 1979
'DISTR IBU ION Central Files NRC PDR PSB Reading FRO/1:
HEf%RANDUt1 FOR:
A. Schwencer, Chief, Operating Reactors Branch No.
1 Division of Operating Reactors G. Lainas, Chief, Plant Systems Branch Division of Operating Reactors w
SUBJECT:
DONALD C.
COOK, UNITS 1
5 2, RE(UEST FOR ADDITIONAL INFORMATION FOR DEGRADED GRID VOLTAGE (TACS 10015 8( 10016)
Plant Name:
Donald C. Cook, Units 1
5 2 Docket Nos.-:
50-315 and. 50-316 Responsible Branch:
ORB-1 Project Manager:
D. Wigginton Reviewing Branch:
Plant Systems Branch Status:
Awaiting Info@nation
'n response to technical assistance request TACS,10015 and 10016, the Plant Systems Branch has reviewed the licensee's submittal of July 22, 1977 and found that additional information is required in order to complete our review.
. The attached request for additional information should be forwarded to the licensee as soon as possible with a request for response within 45 days.
G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
Contact:
S; Rhow X28077
Enclosure:
As stated cc w/enclosure:
D. Eisenhut R. Vollmer W. Russell B. Grimes D.
Wi inton D. Tondi P.
Shemanski N. Chiramal S.
Rhow C..Cleveland EG8G'
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MEMORANDUM FOR:
A. Schwencer, Chief, Operating Reactors Branch No.
1 Division of Operating Reactors FROM:
SUBJECT:
G. Lainas, Chief, Plant Systems Branch Division of Operating Reactors DONALD C.
COOK, UNITS 1
5 2, REQUEST FOR ADDITIONAL INFORMATION FOR DEGRADED GRID VOLTAGE (TACS 10015 5 10016)
Plant Name:
Donald C. Cook, Units 1
8 2
Docket Nos.:
50-315 and 50-316 Res pons ible Branch:
ORB-1 Project Manager:
D. Wigginton Reviewing Branch:
Plant Systems Branch Status:
Awaiting Information In response to technical assistance request TACS 10015 and 10016, the Plant Systems Branch has reviewed the licensee's submittal of July 22, '1977 and found that additional information is required in order to complete our re Y lew.
The attached request for additional information'should be forwarded to the licensee as soon as possible with a request for response within 45 days.
Contact:
S.
Rhow X28077
Enclosure:
As stated G. Lainas, Chief Plant Systems Branch Division of Operating Reactors cc w/enclosure:
D. Eisenhut R. Vollmer W. Russell B. Grimes D. Wigginton G. Lainas D. Tondi P.
Shemanski M. Chiramal S.
Rhow C. Cleveland (EGSG)
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RE/VEST FOR ADDITIONAL INFORMATION DONALD C; COOK NUCLEAR PLANT UNITS 1
AND 2 DEGRADED GRID VOLTAGE (TACS 10015 AND 10016)
Staff Position l.f. states that the voltage monitors shall be designed to satisfy the requirements of IEEE 279-1971.
The intent of this position is that the monitors of the undervoltage protection system for the ESF loads are a part of the Class IE distribution system.
.Therefore, the proposed scheme of monitoring the 34.5 kV line as opposed to the 4160V emergency bus is not acceptable.
Therefore, submit the system modification and Technical Specification changes in compliance with all staff positions of NRC letter dated June 2, 1977, which required you to provide the second level undervolta'ge protection for ESF loads against sustained degraded voltage.
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