ML20069C155
| ML20069C155 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 03/10/1983 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-490, NUDOCS 8303170441 | |
| Download: ML20069C155 (3) | |
Text
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PENHI
- ze 1671 Worcesser Rood Public Service of New Hompshire From!nohom, Mossochu ets o1701 (61' 1 - 872 8100 7
March 10, 1983 SBN-490 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 (b) PSNH Letter, dated April 8,1982, " Response to 460 Series RAIs; (Ef fluent Treatment Systems Branch)," J. DeVincentis to F. J. Miraglia
Subject:
Open Item Response:
(SRP 11.5; RAI 460.35; Meteorological and Ef fluent Treatment Systems Branch)
Dear Sir:
In response to a Request for Additional Information [460.35(d)] from the Effluent Treatment Systems Branch, it was indicated in Reference (b) that "the exhaust from the turbine gland steam condenser will either be monitored separately, or directed to the main plant vent."
The following discussion supercedes the above response to 460.35(d).
It has been determined that it is impractical at the existing stage of construction, to direct the turbine gland steam condenser exhanet to the plant vent.
It is also our position, based on calculations that are discussed in the enclosure to this letter, that there is no valid reason why a radiation monitor need be installed in the turbine gland steam condenser vent.
If you disagree with our position on this item, please notify us promptly.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY b
[ J. DeVincentis Og)l
[
Project Manager ALL/fe' cc: Atomic Safety and Licensing Board Service List 8303170441 830310 PDR ADOCK 05000443 A
PDR 1000 Elm St., P.O. Box 330, Manchester, NH O3105 Telephone (603) 669-4000 TWX 7102207595
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We have reviewed the need for a monitor on the gland steam
- condenser vent and have concluded that there are valid reasons why it should not be required.
Preliminary calculations demonstrate that in the event of a steam generator tube rupture accident, less than one percent of the total activity released is released through the gland steam condenser vent.
Based on these calculations and the worst case whole body doses given in Table 15.6.10 of the FSAR, the whole body dose due to releases f rom the gland steam condenser vent is less than 1 mrem at the exclusion
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area boundary. Main steam line monitors can be used to calculate a release rate f rom this vent.
During normal operation, the station could continue operating with a primary to secondary leak that remained within Technical Specification limits. The leak would produce a reading at the condenser air evacuation monitor and at the bloudown monitor of the affected steam generator. The i'
addition of a monitcr on the gland steam vent would not alert the operator sooner, nor would it alleviate the need for sampling to allow for full documentation of the radionuclides l
being released.
With a primary to secondary leak during routine operation, we will sample and analyze the condenser air evacuation gas stream. A calculation will then be made of the activity released to the gland steam condenser vent and this release i
accounted for as part of the station's total effluent releases.
We commit to providing the following additional information
, by May 27,1983.
o Final calculations of releases f rom gland steam condensor vent for a steam generator tube rupture accident..
Technical specification requirement for sampling o
frequency when primary to secondary leaks are within technical specification limits, o
Air evacuator monitor alarm setpoint.
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r-l ASLB SERVICE LIST e
Roberta C. Pevear Rep. Deverly ifollingworth Designated Representative of Coastal Chamber of Commerce the Town of flampton Falls 209 Winnacunnet Road Drinkwater Road Hampton, Nil 03842 0184 e, llampton Falls, Ul!
Mrs. Sandra Gavutis William S. Jordan, III, Esquire Designated Representative of Harmon & Weiss the Town of Kensington 1725 I Street, N.W.
RFD 1 Suite 506 East Kingston, NH 03827 Washington, DC 20006 Edward J. !!cDermott j Esquire E. Tupper Kinder, Esquire Sanders and McDermott Assistant Attorney General Professional Association Office of the Attorney General 408 Lafayette Road 208 State House Annex Hampton, NH 03842 Concord, NH 03301 Jo Ann Shotwell, Esquire Roy P.
Lessy, Jr., Esquire Assistant Attorney General Of fice of the Executive Legal Director Environmental Protection Bureau U.S. Nuclear Regulatory Commission Department of the Attorney General Washington, DC 20555 One Ashburton Place, 19th Floor Boston, MA 02108 Robert A.
Backus, Esquire Ms. Olive L. Tash 116 Lowell Street Designated Representative of P.O. Box 516 Manchester, NH 0310'5' '
the Town of Brentwood R.F,D.
1, Dalton Road
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Brentwood, NH 03833 Philip Ahrens, Esquire Assistant Attorney General Edward F. Meany Department of the Attorney General Designated Representative of Augusta, ME 04333 the Town of Rve 155 Washington Road Rye, NH 03870 David L.
Lewis Atomic Safety and Licensing Calvin A. Canney Board Panel City Manager U.S. N,uclear Regulatory Commission City Hall 126 Daniel Street Rm. E[W-439 Washington, DC 20555 Portsmouth, NH 03801 T
Mr. John B. Tanzer Designated Representative of the Town of Hampton 5 Morningside Drive Hampton, Nil 03842
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