ML18018B642

Forwards Request for Addl Info Needed to Continue Review of Essential Svcs Chilled Water Sys.Info Requested by 840420

ML18018B642
Person / Time
Site:	Harris
Issue date:	04/11/1984
From:	Knighton G Office of Nuclear Reactor Regulation
To:	Utley E CAROLINA POWER & LIGHT CO.
References
NUDOCS 8405020292
Download: ML18018B642 (8)

Text

. 0 APR >> 1984 Docket No.:

50-400 Mr. E.

E. Utley Executive Vice President Power Supply and Engineering and Construction Carolina Power 5 Light Company Post Office Box 1551

, Raleigh, North Carolina 27602 DISTRIBUTION.,

EDocket--Fi 1 e-50-400-~

NRC PDR Local PDR NSIC LB¹3 Reading JLee BBuckley

Attorney, OELD ACRS (16)

EJordan NGrace

Subject:

Shearon Harris, Unit 1 - Request for Additional Information In order to continue our review of the Shearon Harris essential services chilled water

system, we request that you provide the requested information delineated in the attached enclosure.

Please provide the requested information by April 20, 1984.

Sincerely,

Enclosure:

As stated cc:

See next page Original sioneIi i)v:

George LV. Ko',gh4o George W. Knighton, Chief Licensing Branch No.

3 Division of Licensing DL:LB¹3 D

BBuckley/yt Q

nighton 4/ f/ /84 4/1 i /84 8405020292 8404ii r

PDR ADOCK 05000400 P.DR

=4 I'g

Mr. E.

E. Utley Executive Vice President Power Supply and Engineering and Construction Carolina Power 5 Light Company Post Office Box 1551 Raleigh, North Carolina 27602 George F. Trowbridge, Esq.

Shaw, Pittman, Potts 5 Trowbridge 1800 M Street, NW Washington, DC 20036 Richard E. Jones, Esq.

Associate General Counsel Carolina Power 5 Light Company 411 Fayetteville Street Mall Raleigh, North Carolina 27602 M. David Gordon, Esq.

Associate Attorney General State of North Carolina Post Office Box 629

Raleigh, North Carolina, 27602 Thomas S. Erwin, Esq.

115 W. Morgan Street Raleigh, North Carolina 27602 Mr. George Maxwell Resident Inspector/Harris NPS c/o U.S. Nuclear Regulatory Commission Route 1, Box 315B New Hill, North Carolina 27562 Charles D. Barham, Jr.,

Esq.

Vice President 5 Senior Counsel Carolina Power 8 Light Company Post Office Box 1551 Raleigh, North Carolina 27602 Mr. John Runkle, Executive Coordinator Conservation Council of North Carolina 307 Granville Road Chapel Hill, North Carolina 27514 Mr. Wells Eddleman 718-A Iredell Street Durham, North Carolina 27705 Shearon Harris Mr. George

Jackson, Secretary Environmental Law Project School of Law, 064-A Univeristy of North Carolina Chapel Hill, North Carolina 27514 Dr. Phyllis Lotchin 108 Bridle Run Chapel Hill, North Carolina 27514 Mr. Travis Payne, Esq.

723 W. Johnson Street Post Office Box 12643 Raleigh, North Carolina 27605 Mr. Daniel F.

Read, President CHANGE/ELP 5707 Waycross Street

Raleigh, North Carolina 27606 Bradley W. Jones, Esq.

U.S. Nuclear Regulatory Comm.

Region II 101 Marietta Street Atlanta, Georgia 30303 Richard D. Wilson, M. D.

725 Hunter Street Apex, North Carolina 27502 Regional Administrator - Region II U.S. Nuclear Regulatory Commission 101 Marietta Street Suite 3100 Atlanta, Georgia 30303 Mr. Robert P. Gruber Executive Director Public Staff -

NCUC Post Office Box 991 Raleigh, North Carolina 27602

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P l"

)

)'l

Dr. Linda Little Governor's llaste I1anagement Board 513 Albemarle Building 325 North Salisbury Street

Raleigh, North Carolina 27611

Request for Additional Information Shearon Harris, Unit 1 How are the water chillers seismically qualified to assure operability during an earthquake?

Does the seismic qualification include the control panels attached. to the chiller unit?

These panels may contain numerous control relays which may not be permitted to "chatter" dur ing an earthquake.

What are the limitations concerning restart of operating compressors following a loss of off-site power during an earthquake?

Is the restart delay time acceptable?

Is the restart control circuitry control grade?

How is the compresser restart programmed into the diesel-generator loading sequence?

Is the control panel and associated components environmentally qualified?

How essential are the chillers?

How long can the plant operate without them?

What are the materials of contruction of the chiller package?

Have the materials been qualified for low-temperature operation during a seismic event?

AH-12 (Switchgear room) contains two coils; one on subsystem A and the other one on B.

Is either centrifugal fan in AH-12 in close proximity of the two coils such as a fan failure will rupture both coils?

If a simultaneous leak should occur in both chiller systems, how will it be isolated without damage to the chiller pumps?

How much recovery time is available?

The chilled water supply to AH-14 (non-essential equipment room) comes from both systems A and B through isolation valves.

What signal isolates these valves in both chiller systems?

What provision is made to isolate AH-12 and AH-13 from System A and 8

chilled water (no isolation valves shown in Fig. 9.2.8-1)?

Will a fire, or act of sabotage, in the vicinity of chiller A an its assoiated area coolers (AH-19 SA and SB supplied by chilled water A and B),

which are physically close, wipe out all essential chilled water?

What would be the consequences?

Is AH-19 typically a single unit with system A and B chiller coils or are there two separate AH units?

16.

What other form of room cooling is provided in areas served by the ESF equipment cooling fan coolers?

4'