ML20070S280
| ML20070S280 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 02/02/1983 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-453, NUDOCS 8302040338 | |
| Download: ML20070S280 (3) | |
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I SEABROOK STATION Enginsedng OMkm 1671 Worcester Rood Pub 5c Service of New Hampshire February 2, 1983 SBN-453 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:
Open Item Response:
(SRP 6.1.1; Chemical Engineering Branch)
Dear Sir:
In response to the open item regarding our exception to the SRP recommendation that an inert cover gas be utfifzed on the sodium hydroxide tank, we have enclosed a revised version of FSAR Section 6.2.2.2 (FSAR Page 6.2-43) which was previously discussed with the Chemical Engineering Branch reviewer (Mr. Paul Wu) on December 1, 1982.
The enclosed FSAR revision will be included in OL Application Amendment 48.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY
/
p<p i J. DeVincentis Project Manager DI gO ALL/fsf cc: Atomic Safety and Licensing Board Service List 8302040338 830202 PDR ADOCK 05000443 A
PDR 1000 Elm St., P.O. Box 330, Manchester,NH 03105 Telephone (603)669-4000. TWX 7102207595
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ASLB SERVICE LIST Philip Ahrens, Esquire Assistant Attorney General Department of the Attorney General Augusta, ME 04333 Representative Beverly Hollingworth Coastal Chamber of Commerce 209 Winnacunnet Road Hampton, NH 03042 William S. Jordan, III, Esquire Harmon & Weiss 1725 I Street, N.W.
Suite 506 Washington, DC 20006 E. Tupper Kinder, Esquire Assistant Attorney General Office of the Attorney General 208 State House Annex Concord, NH 03301 Robert A. Backus, Esquire 116 Lowell Street P.O. Box 516 Manchester, NH 03105 Edward J. McDermott, Esquire Sanders and McDermott Professional Association 408 Lafayette Road Hampton, NH 03842 Jo Ann Shotwell, Esquire Assistant Attorney General Environmental Protection dureau Department of the Attorney General One Ashburton Place, 19th Floor Boston, MA 02108 4
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O e s.D 4F SB 1 & 2 Amendme FSAR Se er 1982 t
atmospheric carbon dioxide during long-term storage. Using Ochou.:%
extremely conservative assumptions, it has been calculated O
that a very small fraction (0.0133) of the NaOH would react with the CO2 during the life of the plant. The calculation assumes one complet_e volume change of air per day (in a stagnant Ig tank) with completetreaction of all CO. The minimum total 2
3 volume of NaOH (1260 ft ) was assumed to be present in the tank, thus maximizing ehe available air space (291 ft3),
The above calculated loss of NaOH through reaction with atmospheric CO2 would result in a reduction of NaOH concen-tration from 20% to 19.7% (by weight) over a forty year period.
This is well within the range of concentrations allowed by the plant technical specifications. This will be verified periodically by chemical analysis.
11 3.
Containment Spray Heat Exchangers The containment spray heat exchangars are shell and tube type heat exchangers with spray flow in the tube side and primary component cooling water (PCCW) on the stell side. They are sized such that one containment spray heat exchanger and one
'N residual heat removal heat exchanger provide 100% of design l
heat removal capacity.
Heat exchanger parameters, including flow races, were selected such that one RHR heat exchanger and one CBS heat exchanger satisfy containment cooling requirements. Table 6.2-76 contains the heat exchanger performance data used for the accident analyses.
4.
Spray Heade, i and Nozzles l
l The spray headers are positioned in the containment dome to maximize coverage of the containment volume. Four separate i'
headers are utilized to obtain the distribution of the flow, l
two for each 3010 gpm train. Each train contains 198 nozzles l,
witn each nozzle providing a flow of 15.2 gpa (see Figures l
6.2-79 and 6.2-80).
5.
Refueling Water Storage Tank The refueling water storage tank (RWST) is designed to store 475,000 gallons of borated water. This tank is designed to supply water both for refueling operations and to the contain-ment spray system and the emergency core cooling system during accident operations. The RWST capacity is based on accident requirements and will supply the safety injection, the charging, residual heat removal and containment spray pumps for at least
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21.9 minutes during the injection phase of a design base accident.
Margin is provided to allow time for transfer of the systems to the recirculation mode and to account for instrument errors.
I 6.2-43 l