ML20008F503

Forwards Power Sys Branch Request for Addl Info for Review of Fire Protection Plans

ML20008F503
Person / Time
Site:	Midland
Issue date:	04/15/1981
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
References
NUDOCS 8104210097
Download: ML20008F503 (7)

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APR 15 1981 c.iem Cf Docket Nos.: 50-329-330 2

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'Du.s.Nfg UA Mr. J. W. Cook Vice President Co sumers Power Company 9

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1945 West Parnall Road 6

Jackson, Michigan 49201

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON FIRE PROTECTION - MIDLAND PLAffT UNITS 1 AND 2 In order to complete our review of the fire protection plans for Midland Plant, Units 1 & 2, weeneed the additional infor::1ation requested by Enclosure 1.

These requests relate tn fire protection reviews performed by our Power Systems Branch.

Should you have questions regarding Enclosure 1, contact Om Chopra (301) 492-7159 c our Project Manager. These questions may also be discussed r

during our fire protection meeting on April 15, 1981.

Sincerely, s.

Robert L. Tedesco, Assistant Director for Licensing Division of Licensing l

Enclosure:

1 As stated I

cc: See next page.

DISTRIBUTION:

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APR 15 1981 DISTRIBUTION:

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APR 15 1981 Docket Nos. 50-329 and 50- 330 Mr. J. W. Cook Vice President Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON FIRE PROTECTION -

MIGLAND PLANT, UNIT NOS. 1 & 2 In order to complete our review of the fire protection plans for Midland Plant, Unit Nos.1 & 2, we need the additional information requested by Enclosure 1.

These requests relate to fire protection reviews performed by our Power Systems Branch.

Should you have questions regarding Enclosure 1, contact Om Chopra (301) :

492-7159 or our" Project Manager. These questions may atos be discussed during our fire protection meeting on April 15, 1981.

t Sincerely, OW Robert L. Tedesco, Assistant Director for Licensing Division of Licensing

Enclosure:

As stated cc: See next page 9

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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 Alan S. Farnell, Esq.

Department of Public Health Isham, Lincoln & Beale P.O. Box 33035 Suite 4200 Lansing, Michigan 48909 1 First National Plaza Chicago, Illinois 6C603 James E. Erunner, Esq.

William J. Scanlon, Esq.

Consum:rs Power Company 2034 Pauline Boulevard 212 West Michigan Avenue Ann Arbor, Michigan 48103 Jackson, Michigan 49201 U. S. Nuclear Regulatory Commission Myron M. Cherry, Esq.

Resident Inspectors Office 1 IBM Plaza Route 7 Chicago, Illinois 60611 Midlend, Michigan 48640 3

Ms.MarySi$ clair Ms. Barbara Stamiris 5711 Summerset 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 Mr. Steve Gadler 2120 Carter Avenue St. Paul, Minnesota 55108 i

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. cc: Commander, Naval Surface Weapons Center ATTN:

P. C. Huang White Oak Stiver Spring, Maryland 20910 Mr. L. J. Auge, Manager Facility Design Engineering Energy Technology Engineering Center P. O. Box 1449 Capaga Park, California 91304 Mr. William Lawhead U. S. Corps of Engineers NCEED - T 7th Floor 477 Michigan Avenue Detroit, Michigan 48226

~ Charles Bechhoefer, Esq.

Atomic Safety & Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Mr. Ralph S. Decker Atomic Saf)ty & Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Dr. Frederick P. Cowan Apt. B-125 6125 N. Verde Trail Bcca Raton, Florida 33433 e

I

ENCLOSURE 1 REQUE3TS FOR FIRE PROTECTION INFORMATION 040.0 POWER SYSTEMS BRANCH

'040.121 In accordance with Section ?.5.1, Branch Technical Position ASB 9.5-1, (9.5.1)

Position C.4.a.(1) of NRC Standard Review Plan and Section III.G of Appendix R to 10 CFR Part 5), it is tM staff's position that cabling for redundant safe shutdown systems should be separated by walls having a three-hour fire rating or equivalent protection (see Section III.G.2 of Appendix R). That is, cabling required for or associated with the primary method of shutdown, should be physically separated by the equivalent of a three-hour rated fire barrier from cabling required for or asscciated with the redundant or alternate method of shutdown. To assure that redundant shutdown cable systems and all other cable systems that are associated with the shutdown cable systems are separated from each other so that both are not subject to damage frem a single fire hazard, we require the following information for each system neeced to bring the plant to a safe shutdown:

1.

List all equipment including instrumentation and vital support system equipment required to achieve and maintain hot and coid shutdown.

For each item listed:

a.

Differentiate between equipment required to achieve and maintain hot shutdown and eqripment required to achieve and maintain cold shutdown; b.

Define the equipment's location by fire area; c.

Define the equipment's redundant counterpart; d.

Identify the equipment's essential cabling (instrumentation, control, and power).

For each cable identified:

(1) Describe the cable routing by fire area from source to tennination, and (2)

Identify each fire area location where the cables are separated by a wall having less than a three-hour fire rating (or by less than its equivalent) fros; cables for any redundant shutdown system; and i

e.

Identify any problem areas from Item 1.d.(2) above that will be corrected in accordance with Section III.G.3 of Appendix R (i.e., alternate or dedicat'ed shutdown capability).

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. 2.

List Class IE and Non-Class IE cables that are associated with the essential safe shutdown systems identified in Item 1 aboveE.

For each cables listed:

a.

Define the cables' association (e.g., common power source, comon raceway, separation less than IEEE Standard-384 guidelines, cables for equipment whose spurious operation will adversely affect shutdown systems) to the safe shutdown system; b.

Describe each associated cable routing by fire area, from source to termination; and c.

Identify any location in which the associated cables are separated by a wall having less than a three-hour fire rating (or by less than its equivalent) frcm cables required for or associated with any. redundant shutdown system.

3.

Provide one of the following options for each of the circuits identified in Item 2.c above:

(a) The results of an analysis that demonstrates that failure caused by open, ground, or hot short of cables will not affect it's associated shutdown system;lf or

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Identify each circuit requiring a solution in accordance with Section III.G.3 of Appendix R, or i

(c)

Identify each circuit meeting or that will be modified to l

meet the requirements of Section III.G.2 of Appendix R l

(i.e., three-hour wall, 20 feet of clear space with automatic j

fire suppression, or one-hour barrier with automatic fire suppression).

040.122 To review compliance with GDC 19 with respect to fire protection, we (9.5.1) need the following information for the control room.

If credit is to be taken for an alternate or dedicated shutdown method for other fire areas (as identified by Item 1.e or 3.b of Request 040.121) in accordance with Section III.G.3 of Appendix R to 10 CFR Part 50, then the following information will also be needed for each of these plant areas:

a.

A list of all equipment, including instrumentation and vital support system equipment, that are required by the primary method of achieving and maintaining hot 'and cold shutdown.

FOOTNOTES E0ption 3a is considered to be one method of meeting' the requirements of Section I

III.'G.3 Appendix R.

If option 3a is selected, the information requested in Items 2a and 2c above should be provided in general terms and the information requested by Item 2b need not be provided.

2 4 b.

A list of all equipment, including instrumentation and vital support system equipment, that are required by the alternate,

-l dedicated, or remote method of achieving and maintaining hot and

j cold shutdcwn.

s, c.

Identify all alternate shutdown equipment listed in Item b above with essential cables (instrumentation, control, and power) that are located in the fire area containing the primary shutdown equip-ment.

For the equipment listed, provide one of the following:

(1) Detailed electrical schematic drawings that show the essential cables that are duplicated elsewhere and are electrically isolated from the subject fire areas; or (2) The results of an analysis that demonstrates that failure (open, ground, or hot short) of each cable identified will not affect the capability to achieve and maintain hot or cold shutdown.

d.

List Class IE and Non-Class IE cables that are associated with the alternate, dedicated, or remote method of shutdown.

For each item listed, identify each associated cable iccated in the fire area containing the primary shutdown equipment.

For each cable so identified, provide the results of an analysis that demonstrates that failure (open, ground, or hot short) of the

.l associated cable will not adversely affect the alternate, dedicated, i

or remote method of shutdown.

040.123 The decay heat removal systems of PWRs represent a low pressure system (9.5.1) that interfaces with the high pressure primary coolant system.

To preclude a LOCA through this interface, we have established Branch Technical Position RSB 5-1.

This interface typically consists of two redundant and independent motor operated valves with diverse interlocks in accordance with Branch Technical Position ICSB-3. These two motor operated valves and their associated cable may be subject to a singel fire hazard.

It is our concern that this single fire could cause the two valves to open, resulting in a fire-initiated LOCA through this interface.

For our review to determine whether this interface and other high-low pressure interfaces are adequately protected from the effects of a single fire, we need the following l

information a.

Identify each high-low pressure interface that uses redundant electrically-controlled devices (such as two motor-operated valves in series) to isolate or preclude rupture of any primary coolant boundary.

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. b.

Identify each device's essential power and control cabling and describe the cable routing by fire area, from source to termina-tion.

s-Identify any location in which the identified cables are separated c.

by a wall having less than a three-hour fire rating (or by less than its equivalent) from cables for the redundant cevice.

d.

For any areas identified in Item c above, provide the bases and justification for the acceptability of the existing design or any proposed modifications.

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