ML20148F151

Forwards Request for Addl Info Re Spent Fuel Pool Cooling Sys & Storage Rack Installation Per 751209 Discussion.Info Requested by 760105

ML20148F151
Person / Time
Site:	Yankee Rowe
Issue date:	12/12/1975
From:	Purple R Office of Nuclear Reactor Regulation
To:	Groce R YANKEE ATOMIC ELECTRIC CO.
References
NUDOCS 8011030850
Download: ML20148F151 (3)

Text

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4 9 g OE0 12 1975 BISTRIBUTION Docket File JRBuchanan, ORNL ORB #1 Reading ACRS (16)

Docket No. 50-29 Local PDr NRC PDR KRGoller i

TJCarter Yankee Atomic Electric Company OELD ATTN: Mr. Robert H. Groce OISE (3)

Licensing Engineer RAPurple 20 Tterapike Road ABurger Westboro, Massachusetts 01581 SMShePPard SVarga Gentlemen: DEisenhut TBAbernathy, DTIE This refers to your application er a license amendment dated September 25, ,

1975, relating to your submittal of Proposed Change No. 131. Your proposal I involves the replacement of the existing 40 and 26 element spent fuel storage racks with anodized aluminum fixed poison (Boral) curtain racks with reduced center-to-center spacing and a maximans capacity for 285 fuel assemblies. Your proposal also involves the continued use of the existing 110 element rack for storage of fumi having a mini == burnup of 20,000 MWD /MRI.

We have reviewed your submittal and find that we need the additional infor-nation identified in the enclosure to this letter to continue our review.

The itses in the enclosure have been discussed between our staffs on December 9, 1975.

In order to maintain our review schedule we need your response to this request by January 5,1975.

Sincerely, Original signed by R. A.PUi5fi Robert A. Purple, Chief Operating Reactors Branch #1 Division of Reactor Licensing

Enclosure:

Request for Additional p 'O Information 1 I

ces: See neat page TH)$ DOCUM COMTNMS POOR QUN Pg3J ~

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12/17175 12 0 ATE > . . ..l.. .//>-/75. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Form AEC-31e (Rev 9-$3) AECM 0240 ano .4 3 -is-si 4e 44H7s 8011030$fO [

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Yankne Atomic Elc ric Company DEC 1 2 1W5 cc: Mr. Donald G. Allen, President '

Yankee Atomic Electric Co=pany , .

20 Turnpike P.oad '

Westboro, Massachusetts 01581 Greenfield Public Library 402 Main Street ,

Greenfield, Massachusetts 01581

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REQUEST FOR ADDIT: JNAL INFOR%\rION YANKEE-ROUE NtJCLEAR PCNER STATION fYANEEE-RONE)

DOCFET NO. 50-29

1. Provide a functional description of the spent fuel pool cooling system '

and identify the spent fuel pool cooling system performance criteria.

2. Provide spent fu el pool cooling system performance calculations (including heat load) to show that the system is capable to maintain the coolant temperature at 130 0F, or less, under the worst case spent fuel pool :oading conditions.

3. Describe the details of the coolant make up and/or any additional cooling capability that would be available in the event of an assumed spent fuel pool cooling system failure. Include in the description the maximum time of additional cooling availability and the necessary time for hook-up to the additional cooling system, if required.

4. With respect to your description of the new spent fuel storage rack design, confirm that the boral curtain poison parts will not be welded to any storage rack structural components.

5. In connection with your planned use of the existing 110 element rack for storage of fuel having a minimum burnup of 20,000 MWD /5ml, provide the following:

a. The results of additional criticality calculations assuming that fresh fuel would be stored in this rack, and

b. The precautionary measures, handling procedures and administrative controls that you plan to implement to preclucb operator errors that might involve insertion of fuel with less then 20,000 br3D/MTU into the existing 110 element storage rack.

6. Provide an evaluation of accidents assumed to occur while installing the new storage racks in the spent fuel pool. Also, describe your planned precautionary measures to preclude damage to fuel residing in the spent fuel pool during the installation of the new spent fuel storage racks.