ML20057A222
| ML20057A222 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 09/03/1993 |
| From: | Sieber J DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TAC-M84673, NUDOCS 9309130229 | |
| Download: ML20057A222 (4) | |
Text
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4 Beaver Valley Power Statson Shippingpod. PA 15077-0004 7
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JOHN D. S)EDER September 3, 1993 (81 0 3S3-5255 sen,or Vice President ana Fan (412) 643-8069 cni e nacisar ott.cer Nuclear Power Dmston U.
S.
Nuclear Regulatory Commission Attn:
Document Control Desk Washington, DC 20555
Subject:
Beaver Valley Power Station, Unit No. 1 4
Docket No. 50-334, License No. DPR-66 Clarification of Submittal Dated August 16, 1993, on Spent Fuel Rerack (TAC No. N84673) l This letter provides a clarification of information submitted on August 16, 1993, which responded to the NRC's July 13, 1993,. request l
for additional information.
Mr.
Norman Wagner of the NRC staff requested clarification of four items pertaining to control of
. heavy loads-and thermal / hydraulic parameters associated with replacement-of the.
Spent Fuel Pool storage-racks.
Attachment A includes his questions
- as related to our submittal with our responses.
If you have any questions regarding the attached response, please contact Mr. Steve Sovick at (412) 393-5211.
Sincerely,
. D.
Sieber i
cc:
Mr. L. W. Rossbach, Sr. Resident Inspector Mr. T. T. Martin, NRC Region I Administrator Mr. G.
E. Edison, Project Manager
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'4 ATTACHMENT A Beaver Valley Power Station, Unit No. 1 Technical Specification Change Request No. 202 CLARIFICATION OF AUGUST 16, 1993, SUBMITTAL Iten 1 Attachment A,
page A-3, last paragraph:
What keeps the temporary-crane from falling into the Spent Fuel Pool during a seismic event?
Besponse 1 j
~
There are several features to keep the temporary crane from falling into the Spent Fuel Pool during a design basis seismic event.
c I
1.
Calculations have shown that the crane wheel flange will not be lifted above the crane rail during an earthquake.
This provides assurance that the wheels will not move laterally off of the crane rails.
2.
The temporary crane will be physically connected to the-fuel handling crane at four locations:
at each side,' top and bottom.
The connecting links are pipes bolted to places which are in turn bolted around 'the vertical structural members of the temporary and fuel handling ' cranes.
No cutting / drilling will be performed on the fuel handling crane.
The pipe / bolting arrangement has been designed to withstand the force created by either crane trying to lift off the rails and tip.
l 3.
The temporary crane utilizes restraints at the wheels which l
are designed to catch the underside of the rail.
r Item 2 Attachment A,
page A-6, first sentence:
What is meant by the term " shadow?"
t Response 2 The term
" shadow" represents the area directly beneath the heavy load.
A-1 i
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ATTACHMENT A I
Beaver Valley Power Station, Unit No. 1 Technical Specification Change Request No. 202 j
CLARIFICATION OF AUGUST 16, 1993, SUBMITTAL j
Item 3 Attachment A,
page A-9:
Does any river water system design provide for automatic river water make-up to the Spent Fuel Pool?
Responge 3 No.
Manual actions are necessary to align the river water header to the Spent Fuel Pool.
This valve alignment can be completed within 30 minutes.
Item 4
{
i Attachment A,
page A-7:
What is the normal plant response when the Spent Fuel Pool temperature exceeds 140*F?
Besponse 4 The alarm response procedure, 1.20.4.AAD (attached), requires:
[
1.
Verifying the Spent Fuel Pool temperature high alarm.
2.
Verifying reactor plant component cooling water I
temperature.
3.
Increasing cooling water flow to the operating heat exchanger.
4.
Consider placing a
second pump and heat exchanger in service.
5.
Consider connecting the river water system to the heat exchangers to provide additional cooling water flow.
These actions would be taken when the alarm setpoint (presently set at 143*F) is reached.
The normal plant response would be to keep the Spent Fuel Pool temperature below the alarm setpoint.
r A-2
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B.V.P.S. - 0.M.
1.20.4 Issue 3/Rev 0 Page AAD1.of 1
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AAD. SPENT FUEL' POOL TEMPERATURE HIGH i
Ann. Window No. A6-4 Setpoint:
143F Disconnect Switch:
1005. Bay 3 l
Initiating Device: TIS-FC-103 Probable Causes f
- l 1.
Increased heat load af ter refueling.
l 2.
Low or loss of cooling flow.
i 3.
Increasing CCR temperature due to increased load on CCR system or l
rising river-water temperature.
l I
4.
Loss of CCR.
I Corrective Actions 1.
Verify alarm by checking [TI-FC-103), VB-C.
l 2.
. Verify CCR temperature [TI-CC-100), VB-C.
1 3.
If fuel pool temperature is high and CCR temperature is in normal
.)
operating range, increase cooling water flow to operating heat
-l exchanger.
4.
If cooling flow is at maximum, give consideration to placing l
second pump and heat exchanger in service.
i 5.
If high temperature is a result of loss of CCR flow, consider connecting river water system to heat exchangers' using. the j
appropriate parts of 1.33.4T.
References
.l NOTE:
All references used prior to 11/11/85 are located in Section 5.
1..
OMDR No.85-780 (Issue 3).
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