ML20216C385

Forwards Request for Addl Info for Exemption from Financial Protection Requirement Limits

ML20216C385
Person / Time
Site:	Maine Yankee
Issue date:	04/09/1998
From:	Michael Webb NRC (Affiliation Not Assigned)
To:	Meisner M Maine Yankee
References
TAC-MA0659, TAC-MA0660, TAC-MA659, TAC-MA660, NUDOCS 9804140408
Download: ML20216C385 (6)

Text

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April 9, 1998 Mr. Michael J. Meisner, President Meine Yankee Atomic Power Company '

P.O. Box 408 Wiscasset, Maine 04578

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR EXEMPTION FROM FINANCIAL PROTECTION REQUIREMENT LIMITS (TAC NOS. MA0859 AND MA0660)

Dear Mr. Meisner:

We are conducting our review of your proposed exemptions to certain insurance coverage and financial protection requirement limits of 10 CFR 50.54(w) and 10 CFR 140.11, as detailed in your letter to us dated January 20,1998. However, in order for i s to independently evaluate your conclusion that the spent fuel stored at Maine Yankee would not be susceptible to a zircaloy fuel clad fire that could result in radiological consequences for which full financial protection is required, should the spent fuel pool be drained of all water, we require site-specific dimensions and construction information pertaining to the i Maine Yankee wet spent fuel storage system. This request affects nine or fewer respondents and therefore, is not subject to Office of Managernent and budget review under I P.L.96-511.

If you have any questions regarding this request, please contact me at (301) 415-1347. i l

Sincerely, ORIGINAL SIGNED BY:

Michael K. Webb, Project Manager Non-Power Reactors and Decommissioning Project Directorate Division of Reactor Program Management  !

Office of Nuclear Reactor Regulation Docket No. 50-309

Enclosure:

c / enc osure: 3 See next page DISTRIBUTION:

HARD COPY ,. E-MAIL COPY Oocket File 50-309 PUBLIC RBurrows RDudley CGC SWeiss MFairtile TFredrichs JRoe Region i PHarris AMarkley MMasnik MWebb JMinns LThonus PDND r/f LWheeler p PDND:PM PDND:LA PDND:(A)SC PDND:(A)D MWebb w EHylton MMasnik MMendonca 4/7/98 4/ g/98 4/ g/98 OFFICIAL RECORD COPY 4/ }/98 \ \

DOCUMENT NAME: G:\SECY\WEBB\RA10659 DOCUMENT NAME: G:\SECY\WEBB\RAIO659 TYPED: 4/6/98 \

p(0 9004140408 980409 PDR ADOCK 05000309 P PDR  ;

i April 9, 1998 Mr. Michael J. Meicner, President Maine Yarkee Atomic Power Company

P.O. Box 408 Wiscasset, Maine 04578 i

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR EXEMPTION FROM FINANCIAL PROTECTION REQUIREMENT LIMITS (TAC NOS. MA0659 AND

' MA0660) i

Dear Mr. Meisner:

We are conducting our review of your proposed exemptions to certa ln insurance coverage and financial protection requirement limits of 10 CFR 50.54(w) and 10 CFR 140.11, as detailed in your letter to us dated January 20,1998. However, in order for us to--

independently evaluate your conclusion that the spent fuel stored at Maine Yankee would not be susceptible to a zircaloy fuel clad fire that could result in radiological consequences for which full financial protection is required, should the spent fuel pool be drained of all water, we require site specific dimensions and construction information pertaining to the Maine Yankee wet spent fuel storage system. _This request affects nine or fewer respondents and therefore, is not subject to Office of Management and budget review under P.L 96 511.

If you have any questions regarding this request, please contact me at (301) 415-1347.

Sincerely, ORIGINAL SIGNED BY:

Michael K. Webb, Project Manager' Non-Power Reactors and Decommissioning Project Directorate Division of Reactor Progam Management Office of Nuclear Reactor Regulation Docket No. 50-309

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Enclosure:

As stated -

cc w/ enclosure:

See next page DISTRIBUTION:

HARD COPY E-MAIL COPY Docket File 50-309 PUBLIC RBurrows RDudley OGC SWeiss - MFairtile TFredrichs JRoe Region i PHarris AMarkley MMasnik MWebb JMinns LThonus PDND r/f LWheeler p PDND:PM PDND:LA PDND:(A)SC PDND:(A)9 MWebb w EHylton - MMasnik MMendonca 4/'t /98 - 4/ g/98 4/ g/98 OFFICIAL RECORD COPY 4/ }/98 DOCUMENT NAME: G:\SECY\ WEB 8\RA10659 DOCUMENT NAME: G:\SECY\WEBB\RA10659 TYPED: 4/6/98

, px%q (I, $ UNITED STATES

. g g NUCLEAR REGULATORY COMMISSION 2 WASHINGTON. D.C. 30866 0001 Aptil 3, 1998

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Mr. Michael J. Meisner, President Maine Yankee Atomic Power Company i P.O. Box 408 Wiscasset, Maine 04578

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR EXEMPTION FROM FINANCIAL PROTECTION REQUIREMENT LIMITS (TAC NOS. MA0659 AND MA0660)

Dear Mr. Meisner:

We are conducting our review of your proposed exemptions to certain insurance coverage and financial protection requirement limits of 10 CFR 50.54(w) and 10 CFR 140.11, as detailed in your letter to us dated January 20,1998. However, in order for us to ,

independently evaluate your conclusion that the spent fuel stored at Maine Yankee would j not be susceptible to a zircaloy fuel clad fire that could result in radiological consequences !

for which full financial protection is required, should the spent fuel pool be drained of all water, we require site-specific dimensions and construction information pertaining to the Maine Yankee wet spent fuel storage system. This request affects nine or fewer respondents and therefore,is not subject to Office of Management and budget review under P.L.96-511.

If you have any questions regarding this request, please contact me at (301) 415-1347.

Sincerely, 4

• bwJLJ ~K ~2dA~

Michael K. Webb, Project Manager Non Power Reactors and Decommissioning Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation Docket No. 50-309

Enclosure:

As stated cc w/ enclosure:

See next page '

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' Maine Yankee Atomic Power Station

'cc: Docket No. 50-309 Mr. Charles B.~ Brinkman I Manager - Washington Nuclear -

l Operations Friends of the Coast '

AB8 Combustion Engineering P.O. Box 98 12300 Twinbrook Parkway, Suite 330 Edgecomb, ME 04556 Rockville, MD 20852 -

Mr. William O' Dell

- Thomas G. Dignan, Jr., Esquire Operations Director Ropes & Grav Maine Yankee Atomic Power Company One international Place P.O. Box 408 Boston, MA 02110-2624 Wiscasset, ME 04578 Mr. Uldis Vanags - .

Mr. George Zinke, Director State Nuclear Safety Advisor Nuclear Safety and Regulatory Affairs State Planning Office Maine Yankee Atomic Power Company State House Station #38 P.O. Box 408 Augusta, ME 04333 Wiscasset, ME 04578 i Mr. P. L. Anderson, Project Manager Mr. Jonathan M. Block Yankee Atomic Electric Company Attorney at Law 580 Main Street. P.O. Box 566 Bolton, MA 01740-1398- Putney, VT 05346-0566 Regional Administrator, Region 1 Mr. Michael J. Meisner, President U.S. N9 clear Regulatory Commission Main Yankee Atomic Power Company 475 Allendale Road P.O. Box 408 i King of Prussia, PA 19406. Wiseasset, ME 04578 l

First Selectman of Wiscasset Mr. Robert Fraser, Director Municipal Building Engineering U.S. Route 1- Maine Yankee Atomic Power Company

' _Wiscasset, ME .04578 P.O. Box 408 1 Wiscasset, ME 04578 l L Mr. Richard Rasmussen i Senior Resident inspector Mr. Patrick J. Dostie Maine Yankee Atomic Power Company State of Maine Nuclear Safety

_ U.S. Nuclear Regulatory Commission inspector l ,

P.O. Box E Maine Yankee Atomic Power Company l Wiscosset, ME 04578. P.O. Box 408 Wiscasset, ME 04578 Mary Ann Lynch, Esquire Maine Yankee Atomic Power Company - Mr. Mark Ferri P.O._ Box 408 Decommissioning Director Wiscasset, ME 04578 - Maine Yankee Atomic Power Company P.O. Box 408 Wiscosset, ME 04578

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ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION

~ BY THE OFFICE OF NUCLEAR REACTOR REGul$I1Qh[

ASSESSMENT OF THE LOSS OF WATER FROM THE SPENT FUEL POOL AT MAINE YANKFF ATOMIC POWER STATION As part of the submittal review, confirmatory calculations will be performed regarding the maximum temperature of the' spent fuel given the water of the poolis completely drained.

To expedite the process, please provide the following information in the designated units.

Provide any variables that are dependent on temperature at 533'K [500*F] and 700*K .,

1800*F]. State all assumptions made and provide drawings,if necessary. if approximate j values are provided, indicate the degree of certainty conservatively applied to the value. '

For each batch of assemblies,~ provide the following information:

1. Location or region in pool, if applicable (do not provide the rack location coordinates)

2. Number of assemblies per batch

3. Fuel burnup (MWD /MTU)

4. Enrichment (%)

5. Metric tons of uranium per assembly (MTU) 6.. Batch discharge date For the following parameters (7 22), provide the applicable information for each batch.

Batches with the same properties can be identified in groups.

7. Spent fuel array parameter (i.e,15x15,7x7)-

> 8. Number of active fuel rods per assembly

-9. Outside rod diameter of the fuel (m)

10. _ Rod center-to-center pitch (m)

11. Fuel rack cell / channel dimension (s) (m)

12. Thickness of the cell wall. If the rack is an open-lattice type, please state as such (m)

13. Center to-center pitch of assemblies (m)

14. Diameter of baseplate hole (m)

15. Thermal conductivity of the cell walls (W/m-K)

16. Specific heat of cell walls - (Joule /Kg-K)

17. Density of cell walls (Kg/m')

18. Thermal conductivity of the fuel (W/m-K)

19. Specific heat of fuel (J/Kg-K)

- 20. Density of fuel (Kg/m')

21. Cladding material

22. . Thermal conductivity of the clad (W/m-K)

23. Specific heat of clad (J/kg *:)

24. Density of clad (Kg/m')

25. Th:ckness of the clad (m) j l

b-For the spent' fuel pool and building, provide the following information:

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26. Thermal conductivity of the concrete (pool encasement) (W/m-K)

27. Specific heat of concrete (Joule /Kg-K)

, 28. Density of concrete (Kg/m')

L 29. Thickness of pool concrete encasement (m)

30. Thermal conductivity of the storage building walls and ceiling (W/m-K)

.31. Specific heat of storage building walls and ceiling (Joule /Kg-K)

32. Density of storage building walls and ceiling (Kg/m') >

33. - Average thickness of the storage building walls and ceiling (m)

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34. Total surface area of the storage building walls and ceiling (m 2)

35. . Volume of storage building (m')

36. Total surface area of the pool floor (m 2) .

l 37. Height from pool floor to baseplate of the rack (m)

38. Width of downcomer - distance between racks and the edge of the pool (m)

39. Cross-sectiorni area of the border of the pool (space between the pool wall and the cells) (m2)

40. Length of active fuel (m) '

l 41. Length from the top of the active fuel to the top of the spent fuel rack (m)

42. To characterize the open volume in the racks that do not contain assernblies, please describe the amount of empty cells, water boxes, etc. in the pool.

43. Decay heat for each assembly (KW)

44. Emissivity of pool walls and cladding

45. Provide diagrams showing elevations or distances for the pool:

Top view Provide a top view of the pool. Please include, but not limited to, the lengths and widths of pool, clearances / space around the edge of the pool, layout of the modules, open space, and cask loading area (if applicable).

Top view Provide a top view of a cell showing the well thickness and cell dimensions.

Side view Provide an elevation drawing of the fuel racks from the pool floor to the top of the racks. Please include, but not limited to, the space between the floor and the bottom of the spent fuel rack, the active fuel height, the distance from the top of the active fuel to the top of the cell.

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