ML20083E694
| ML20083E694 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 12/20/1983 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-602, NUDOCS 8312290355 | |
| Download: ML20083E694 (4) | |
Text
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PUBLIC SERVICE SEAmm STATION S,L:: N Ofke:
Companyof New Hampshre 1671 Worcedor Road Fromingham, Massachusetts 01701 (617) - 872 - 8100 December 20, 1983 SBN-602 T.F. B7.1.2 United States Nuclear Regulatory Commission Washington, D. C.
20555 Attention:
Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444
Subject:
Spent Fuel Pool Temperature Reduction
Dear Sir:
We have enclosed a revised version of FSAR Section 9.1.3.3 and FSAR Table 9.1-3.
These revisions indicate a reduction in the Spent Fuel Pool temperature under abnormal, operating conditions. The temperature decrease is attributable to a recalculation with design component cooling water flow to the intact Spent Fuel Pool Heat Exchanger. The previous temperature was based on less than full design flow.
The enclosed revision will be incorporated into a future OL Application Amendment.
Very truly yours, YANKEE ATO IC ELECTRIC COMPANY j'
)~
John DeVincentis Project Manager cc: Atomic Safety and Licensing Board Service List 0
Q, l\\
8312290355 831224 PDR ADOCK 05000443 A
SB 1&2 Amendment 49 FSAR May 1983 c.
Reactor Cavity and Canal Cleanup System The reactor cavity cleanup portion of the system is designed to purify the reactor cavity during refueling operations to improve the optical clarity of the water. A composite drawing showing this function is shown in Figure 9.1-2.
The system consists of five surface skimmers at the water surface of the refueling cavity and refueling canal, all piped to the suction of the reactor cavity cleanup system. The' cavity water is pumped through the chemical and volume control system mixed bed demineralizer and filters to the suction of the residual heat removal pumps where it is returned to a cold leg through a residual heat removal heat exchanger.
Suction can also be taken from any of the cavity drains and final cavity cleanup effected by pumping the cavity water through a port-able cleanup filter.
The reactor cavity cleanup pump motor is not Class 1E, and is supplied from a motor control center in the control. building.
9.1.3.3 Safety Evalt stion Normally, more than 25 feet of water is maintained over the spent fuel. During fuel handling operations, the operator is protected from direct shine emanating from the spent fuel by at least 10 feet of water. The purification provided by the cleanup system, in addition to the water levels maintained above the i
spent fuel, result in a pool surface radiation level of less than 2.5 mr/hr, l
which allows unlimited operator access to the surface of the pool and cooling l
system components. However, the filters and the demineralizer in the cleanup l
system are expected to collect particulate and ionic radioactive materials, and thus have restrictive access. These components are located in the primary 44 4q l
auxiliary building behind shield walls. A radiological evaluation of the l
l purification loop is presented in Chapters 11 and 12.
l Each spent fuel pool pump is capable of circulating pool water through either spent fuel pool heat exchanger.
If one spent fuel pool pump becomes inoperable for any reason, the remaining pump supplying half flow to each heat exchanger can maintain pool water temperatures at 1350F, with sixteen spent core regions stored in the pool.
If only one spent fuel pool pump and heat exchanger are operable, the pool water temperature can be maintained below with 16 spent core regions in the pool (refer to Table 9.1-3).
48 The thermal capacity of the spent fuel pool cooling system equals the physical l
storage capacity of the spent fuel pool. Thus, actual water temperatures l
will be no greater than those indicated in Table 9.1-3.
The spent' fuel pool cooling and cleanup system is designed so that the pool l
level will not be inadvertently drained below a point approximately 10 feet l
9.1-11c l
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TABLE 9.1-3 SPENT FUEL POOL COOLING AND CLEANUP SYSTEM DESIGN CONDITIONS NORMAL OPERATING CONDITIONS Sixteen 1/3 Full Core Plus cores stored; sixteen 1/3 l
both SFPHX's cores stored;-
9 and pumps both SFPHX's operating and pumps operating Each Operating SFPHX Heat Load, 106 Btu /hr 9
21.3 SF Pump Flow, gpm 1100 1100 g
PCCW Flow, gpm 810 3000(1) 3_
Pool Temperature, OF (max.)
122 141 g,
w ABNORMAL OPERATING CONDITIONS (1) Normal Power Normal Power sixteen 1/3 sixteen 1/3 cores stored; cores stored; both SFPHX's one SFPHX and one pump and one pump operating operating Each Operating SFPHX l
Heat Load, 106 Btu /hr 9
18.1 SF Pump Flow, gpm 550 1100 Ii AM-hooo E$
PCCW Flow, gpm 810 Pool Temperature,
}:{
5 OF (max.)
135 4fPr / 0 w oo Note:
i (1) Increased PCCW is available under this condition.
l
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-e e:
William S.LJordan, III, Esquire Brentwood Board of Selectmen Harmon & Weiss' RED Dalton Road 1725 I Street, N.W. Suite 506 Brentwood, New Hampshire 03833 Washington,'DC 20006 Roy'P. Lessy, Jr., Esquire Office of the Executive Legal Director Edward F. Meany U.S. Nuclear Regulatory Commission Designated Representative of Washington, DC 20555 the Town of Rye 155 Washington Road Robert A. Backus, Esquire Rye,'NH 03870 116 Lowell Street-P.O. Box 516 Calvin A. Canney Mancehster, NH 03105 City Manager City. Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Department of the Attorney General I
Augusta, ME 04333 Dana Bisbee, Esquire Assistant Attorney General Mr.. John ' B. Tanzer -
Office of the Attorney General Designated Representative of 208 State House Annex the Town of Hampton Concord, NH'03842 5 Morningside Drive Hampton, NH 03842 Anne Verge, Chairperson Board of Selectmen i
Roberta C. Pevear Town Hall Designated Representative of South Hampton, NH 03842 the Town of Hampton Falls Drinkwater Road Patrick J. McKeon Hampton Falls, NH 03844 Selectmen's Office 10 Central Road Mrs. Sandra Gavutis Rye, NH 03870 l
Designated Representative of the Town of Kensington Carole F..Kagan, Esq.
RFD 1 Atomic Safety and Licensing Board Panel
' East Kingston, NH 03827 U.S. Nuclear Regulatory Commission Jo Ann Shotwell, Esquire Assistant Attorney General Mr. Angie Mechiros Environmental Protection Bureau Chairman of the Board of Selectmen
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Department of the Attorney General Town of Newbury One Ashburton Place, 19th Floor Newbury, MA 01950 Boston, MA 02108 Town Manager's Office Senator Gordon J. Humphrey Town Hall - Friend Street U.S. Senate Amesbury, Ma.
01913 Washington, DC 20510
-(Attn: Tom Burack)
Senator Gordon J. Humphrey 1 Pillsbury Street Diana P. Randall Concord, NH 03301 70 Collins Street (Attn: Herb Boynton)
SEabrook, NH 03874' Richard E. Sullivan, Mayor Donald E. Chick City Hall Town Manager Newburyport, MA 01950 Town of Exeter
-10 FrontLStreet Exeter, NH 03833
.