ML17054B951
| ML17054B951 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 10/17/1985 |
| From: | Harold Denton Office of Nuclear Reactor Regulation |
| To: | Mangan C NIAGARA MOHAWK POWER CORP. |
| References | |
| NUDOCS 8510280028 | |
| Download: ML17054B951 (10) | |
Text
Oockek No. 50-220 Niagara Mohawk -Power Corporation Attn:
Mr. C. V. Mangan Senior Vice President c/o Miss Catherine R. Seibert 300 Erie Boulevard West
- Syracuse, New York 13202 October 17, 1985 DISTRI BWION Local PDR HDenton HThompson SNorris ELJordan BGrimes Gray File NRC PDR ORB¹2 Rdg DEisenhut OELD RHermann JPartlow ACRS (10)
GLainas
Dear Mr. Mangan:
SUBJECT:
CERTIFICATION OF POLLUTION CONTROL FACILITIES Re:
Nine Mile Point Nuclear Station, Unit No.
1 By letter dated August 13, 1985, Mr. T.
E.
- Lempges, Niagara Mohawk Power Corporation (NMPC), requested that our office issue a Certification of Pollution Control Facilities for Nine Mile Point, Unit 1 for certain facilities described in the enclosed exhibit.
The NRC staff has reviewed the request of August 13, 1985.
Based on that
- review, we are satisfied that the portion of Nine Mile Point, Unit 1 for which NMPC requested NRC certification is in furtherance of the purpose of abating or controlling atmospheric pollutants or contaminants or water pollutants resulting from the generation of electricity at Nine Mile Point, Unit l.
Accordingly, the enclosed certificate has been executed.
Copies of NMPC's request and this response will be available for inspection at the Local Public Document Room (Penfield Library, State University
- College, Oswego, New York) and at the Commission's Public Document Room at 1717 H Street, N.W., Washington, D.C.
20555.
A copy of the certificate has also been forwarded, per Mr. Lempges'equest, to the New York State Energy Research and Development Authority.
Sincerely, Original signed bp Darrell G. Zisenhut A
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Harold R. Denton, Director Office of Nuclear Reactor Regulation
Enclosures:
As 'stated cc w/enclosures:
See. next.page
- Please see previous concurrence page.
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Mr. C. V. Mangan Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station, Unit No.
1 CC:
Troy B. Conner, Jr., Esquire Conner 8 Wetterhahn Suite 1050 1747 Pennsylvania
- Avenue, N.
W.
Washington, D.
C.
20006 Frank R. Church, Supervisor Town of Scriba R. D. ¹2
- Oswego, New York 13126 Niagara Mohawk Power Corporation ATTN:
Mr. Thomas Perkins Plant Superintendent Nine Mile Point Nuclear Station Post Office Box 32
- Lycoming, New York 13093 Resident Inspector U. S. Nuclear Regulatory Commission Post Office Box 126
- Lycoming, New York 13093 John W. Keib, Esquire Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, New York 13202 Regional Administrator, Region I U. S. Nuclear Regulatory Comnission 631 Park Avenue King of Prussia; Pennsylvania 19406 Mr. Jay Dunkleberger Division of Policy Analysis and Planning New York State Energy Office Agency Building 2 Empire State Plaza Albany, New York 12223 New York State Energy Research and Development Authority Agency Building ¹2 Empire State Plaza
- Albany, New York 12223
CERTIFICATE NINE MILE POINT, UNIT NO.
1 POLLUTION CONTROL FACILITIES The Nuclear Regulatory Commission hereby certifies as follows:
(a) that it has examined exhibits, attached
- hereto, which describe certain facilities which have been constructed at Nine Mile Point, Unit No. 1, a nuclear electric power generating plant located on Lake Ontario in Scriba, New York owned by Niagara Mohawk Power Corporation; and (b) that such facilities, as designed, are in furtherance of the purpose of abating or controlling atmospheric pollutants or contaminants or water pollutants resulting from the generation of electricity at the Nine Mile Point, Unit No. 1.
FOR THE NUCLEAR REGULATORY COMMISSION Date:
LO-l -K
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+ Harold R.
- enton, irector
~'ffice of uclear Reactor Regulation
EXHIBIT A OFF GAS SYSTEM (cont'd)
Mixin Heater Unit The mixing heater is a direct contact type of heater.
Additional steam is introduced to supplement the discharge steam from the steam jet ejectors to superheat the mixture slightly, to reduce hydrogen concentr'ations, and to have adequate flow to cool the recombiners.
Recombiner The recombiner is a vertically mounted pressure vessel.
The gas/air-steam mixture enters the recombiner at the top, flows through the catalyst where the recombination of the Hp and Op content takes place and leaves the recombiner at the bottom.
The Hp-Og recombination takes place automatically.
An electric heater ss provided, however, to assure prompt ignition.
Condenser The condenser is a horizontally mounted U-tube heat exchanger..
The nozzles for the cooling water are welded into the water chamber which is located at one end of the condenser.
The water chamber and the tube bundle can be separated from the condenser for cleaning purposes.
The shell side of the condenser is equipped with a condensate trap.
After Cooler The humidity of the gas stream is reduced in the after cooler.
The gas stream in the "after cooler consists of air, traces of activated gases and traces of fission gases.
The after cooler is a horizontally mounted shell and tube heat exchanger.
The gases flow in many passes around the tube bundle while the cooling water flows in passes through the tubes.
A water separator is provided at the gas outlet to trap condensate droplets.
Chiller The delay of the off-gas stream in the charcoal units functions best if the gas is kept as dry as technically feasible.
There are three (3) chillers provided which alternate on an approximately eight (8) hour cycle.
One is in operation while the other one is being deiced for one hour then idle for four (4) hours and then precooled for three (3) hours.
Water droplets are mechanically removed at the chiller inlet and the remaining humidity is frozen out at -4 F.
The heat is removed by a closed cycle refrigeration system.
Each chiller has its own refrigeration system.
A third chiller and refrigeration system is on standby for any of the other two.
The control of the chiller s is automatic.
EXHIBIT A OFF GAS SYSTEM (cont'd)
Pre Adsarber The Preadsorber is a vertical container.
The filter media is charcoal.
There are two (2) installed, one operating and one standby.
The gas enters the filter from the top, is carried in a center pipe to the bottom and flows in a distribution system through the filter media.
The filter is located in a shielded room.
The filter media fill and drain nozzles are extended through the shielded walls to the upper or lower floor, respectively.
Charcoal Units The delay system consists of a number of tanks, filled with charcoal and connected in series.
The tanks are vertically mounted and the gas flow is from bottom to top.
Absolute Filter (Mechanical Filter)
The absolute filters shall remove radioactive particles and other impurities from the off-gas system.
The filter elements are removable and are contained in a vertically mounted vessel.
The gas flows through the filter from bottom to top.
Mater Rin Pumps The off-gas system is operated at a vacuum to avoid leakage of radioactive gases into the areas where the components of the off gas system are located.
Two water ring pumps are installed (one standby) to draw a
vacuum on the system.
The pumps are sufficiently over designed to cope with an increasing pressure drop of the system.
The water is separated from the gas str earn in a ring water storage tank and the gas is pumped to the stack.
Gener al The components of the off gas system are located in closed and ventilated rooms.
Shielding is provided.
Piping which carries the off gas stream has no flanged connections.
Valves are bellow sealed.
Controls Operations which influence the overall function of the off gas system are controlled from the control room.
Minor process operations are done locally by remote manual control (e.g.
extended spindles).
Activity monitors and alarms, pressure and temperature transmitters, flow-and Hp-writers and alarms assure the safe operation of the off gas system.