ML20206F234

Proposed Tech Spec 1.1, Fuel Storage

ML20206F234
Person / Time
Site:	Maine Yankee
Issue date:	11/08/1988
From:	Maine Yankee
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ML20206F232	List: ML20206F228 ML20206F234
References
NUDOCS 8811210038
Download: ML20206F234 (3)

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MaineYankee '

ATTACHMENT 4 Proposed Technical Specification 8811210038 SS110s Pf6 ADOCK 05000309 P PDC 0395L-RHS

MaineYankee 1.1 EUIL STORAGE 6pp.llcabili ty:

Applies to the capacity and storage arrangements of the new and spent fuel facility.

s Qbjective:

To describe and define those aspects of fuel storage which relate to the prevention of criticality in the fuel storage facility.

Spacification:

A. The new and spent fuel pool structures inclading fuel racks are designed to withstend the anticipated earthquake loadings as Class I structures. The spent fuel pool is lined with stainless steel to ensure against loss of water.

B. Fuel is stored vertically in racks. The racks are designed to maintain fuel assembly center to center distances that will assure Kerr is less than or equal to 0.95 even with the pool filled with unborated water.

C. Whenever there is fuel in the spent fuel pcol, except for initial new fuel storage, the spent fuel storage pool is filled with water borated to the refueling water boron concentration. This concentration matches that in the reactor cavity and refueling canal during refueling operations.

i D. Spent fuel shipping casks shall not be liftsd over the spent fuel storage pool until all irradiated fuel within ten rows of the cask )

laydown area has cooled a minimum of 60 days. ]

i E. No more than 1476 standard fuel assemblies are to be stored in permanent spent fuel racks in the spent fuel pool.

F. No more than 121 standard fuel assemblies may b3 temporarily stored in a temporary spent fuel storage rack to be located in the spent fuel cask Idydown area. These are in addition to the 1476 standard fuel assemblies of specification E.

G. No more than 20 standard fuel assemblies may be in consolic'ated form. These are included in the 1476 standard assemblies of specification E.

Bulli Safety analyses, Reference (a) and NRC safety evaluation reports, Rcrevence (b), document the configuration of Haine Yankee's spent fuel rack design, consolidated pin storage design, and temporary storage i contingency design. These reports demonstrate the safety and environmental acceptability of storing any combiaation of standard and i consolidated spant fuel assemblies in the 1176 permanent storage locations together with up to 121 additional standard fuel assemblies in temporary

storage in the spent fuel cask laydown area.

1.1-1 11/08/88 0395L-RHS

MaincYankee If a 17 1/2 foot long, 7.33 foot diameter spent fuel cask tipped and fell )

into the 10 foot square cask laydown area, it would not impact more than ]

10 rows of fuel assemblies. Analyses conducted in accordance with Standard ]

Review Plan 15.7.5 show that if the assemblies impacted by the cask have )

i cooled a minimum of 60 days, 25% of the part 100 limits will not be exceeded. ]

Therefore, by ensuring that fuel wthin the cask drop area (10 rows from the ]

laydown area) has cooled at least 60 days, 25% of the part 100 limits could )

never be exceeded. ]

Refarences:.

(a) Maine Yankee letter to USNRC dated October 5, 1981, "Maine Yankee Spent fuel Storage Modification - Complete P.eport" with enclosure, as supplemented and amended on February 10, 1982, May 7, 1982, and May 26, 1983.

(b) UNSRC letter to Maine Yankee dat*d June 16, 1982, "Safety Evaluation i and Envrionmental Impact Appraisal Regarding Maine Yanke? Spent Fuel Storage" as supplemented via ijSMC letter to Maine Yankee Vated

October 22, 1982, "Resolution of Open Items - Safety Evaiuation of i Maine Yankee Spent fuel Storage".

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1.1-2 11/08/P3 0395L-RHS