ML19296B791
| ML19296B791 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 02/13/1980 |
| From: | Randy Hall BROOKHAVEN NATIONAL LABORATORY |
| To: | Ferguson R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8002210505 | |
| Download: ML19296B791 (2) | |
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,, 3 BROOKHAVEN NATIONAL LABORATORY Ill]J]
ASSOCIATED UNIVERSITIES, INC.
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.L a Upton. New York 11973 Department of Nuc!ect Energy (516) 345-2144 February 13, 1980 Mr. Robert L. Ferguson Plant Systems Branch U.S. Nuclear Regulatory Canmission Washington, D.C.
20555
Dear Bob:
Attached is the Brookhaven National Laboratory fire protection review for Dresden 1 nuclear power plant, Item 3.1. 3, Fire Water Pump.
Respectfully yours, p ",
j y,-:.y J s-Robert E. Hall, Group Leader Reactor Engineering Analysis REH:EAM:sd attachment cc.:
R. Cerbone co/att.
W. Kato E. MacDougall V. Panciera wo/a': t.
E. Sylvester d
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8002210 O
I DRESDEN 1 Fire Protection Review Item 3.1.3 Fire Water Pump Under a cover letter dated December 4,1979, the licensee forwarded design de-tails for the new 2500 gpm at 145 psi diesel drive fire pump to replace the existing pump.
This item is covered under 3.1.3 Fire Water Pump in the Dresden 1 SER.
The review of the documents submitted show a discrepancy between the drawing M-970 and specification sheets.
The specifications indicate a hose header with eight (8) 2-1/2 inch gated hose connections will be used but the drawing shows only six (6).
The discharge cone is six (6) inches in diameter with a ten (10) inch discharge but the drawing shows only a six (6) inch discharge.
The motor operated valve required in the SER to separate the screen wash sys-tem from the fire protection system is not shown on the drawing.
NFPA #20 requires a ten (10) inch discharge pipe for a 2500 gpm pump. The ex-isting discharge is only eight (8) inch.
The licensee should replace the eight (8) inch pipe with a ten (10) inch pipe or the licensee should submit calculations showing that the pump can meet the pressure requirenents for the water demand with the added loss in the eight (8) inch pipe.
The drawings do not show the proposed 52 gpm jockey pump. This pump should be installed to maintain supervisory pressure in the fire loop. The actuation of the fire pumps should be based on the loss of this pressure.
The present P&ID drawing M970 is incorrect and should be modified to reflect existing and proposed piping. This drawing should be resubmitted along with the design drawings for the piping layout in the pump house.
On February 6,1980 a telephone conference call was held with the licensee and the Nuclear Regulatory Commission. At this time the licensee proposed the foll owing:
e Correct all the dimensional problems listed above.
e Document these changes on print M970 and forward revised print to the NRC.
e Eliminate the jockey pump and replace with 2 inch by-passers around the normally closed motor operated valves that control the flow of water from the unit 2 and 3 screen wash pumps and the fire water system.
Based upon the above review and contingent upon NRC review of the drawings to be resubmitted we find the 3.1.3 Fire Water Pumps acceptable.
We recommend that the staff approve the omission of the jockey pump based on satisfactory completion of the changes listed above. We further recanmend that the staff approve the dimension changes if documented by the licensee.
We further caution that should the existing 8" discharge pipes not be changed to 10" that the licensee be required to submit evidence that he can meet the NFPA #20 pressure requirements.