ML19347F733
| ML19347F733 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 05/12/1981 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 8105260153 | |
| Download: ML19347F733 (4) | |
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Docket Nos.: 50-329/330 Mr. J. W. Cook Vice President Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201
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De.ar Mr. Cook:
SUBJECT:
ER?ATA TO REQUEST FOR APRIL 16, 1981 My letter of April 16, 1981 forwarded an enclosure requesting additional infomation regarding potential control system failures. An errata sheet for Requests 030.57 through 030.59 is attached.
Sincerely, f
original signed t.
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Robert L. Tedesco, Assistant Director j
for Licensing Division of Licensing
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Enclosure:
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As stated l-cc: 'see next page l
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==7 Mr. J. W. Cook Vice President Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201 cc: Michael I. Miller, Esq.
Mr. Don van Farowe, Chief Ronald G. Zamarin, Esq.
Division of Radiological Health Abn S. Farnell, Esq.
Department of Public Health Isham, Lincoln & Deale P.O. Box 33035 Suite 4200 Lansing, Michigan 48909 1 First National Plaza Chicago, Illinois 60603 l
James E. Brunner, Esq.
William J. Scanlon, Esq.
Consumers Power Company 2034 Pauline Boulevard 212 West Michigan Avenue Ann Arbor, Michigan 48103 Jackson, Michigan 49201 U. S. Nuclear Regulatory ;omi::sfon Myron M. Cherry, Esq.-
Resident Inspectors Office 1 IBM Plaza Route 7 Chicago, Illinois 60611 Midland, Michigan 43640 Ms. Mary Sinclair Ms. Barbara Stamiris 5711 Sumerset Drive 5795 N. River Midland, Michigan 48640 Freeland, Michigan 48623 Frank J. Kelley, Esq.
Attorney General State of Michigan Environmental Protection Division 720 Law Building Lansing, Michigan 48913 Mr. Wendell Marshall Route 10 Midland, Michigan 48640 i
Mr. Steve Gadler 2120 Carter Avenue St. Paul, Minnesota 55108 I
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c ENCLOSURE REQUEST FOR ADDITIONAL.INFORMATION 030.55 Identify those control systems whose failure or malfunction could seriously impact plant safety.
030.57 Indicate wnich, if any, of the control systems identified in the response to Request 030.56 receive power from :ommon power sources.
The power sources considered should include all power sources whose -
failure or malfunction could lead to failure or malfunction of more than one control system and should extend to the effects of cascading power losses due to the failure of higher level distribution panels and, load centers.
030.58 Indicate which, if any, of the control systems identified in the response to Request 030.56 receive input signals from common sensors.
The sensors considerea should include, but should not necessarily be limited to, common hydraulic headers or impulse lines feeding pressure, temperature, level or other signals to two or more control systems.
030.59 Provide justification that any simultaneous malfunctions of the l
control systems identified in the responses to Requests 030.57 and l
030.58 resulting from failures or malfunctions of the applicable common power source or sensor are bounded by-the analyses in Chapter 15 and would not require action or response beyond the capability of operators or safety systems.
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