ML19340A125

Proposed Tech Specs 4.1,5.4.1.4 & 5.4.3 Re Dry Storage of New Fuel Assemblies in Fuel Storage Racks Located in Unit 3 Spent Fuel Pool

ML19340A125
Person / Time
Site:	Oconee
Issue date:	04/16/1976
From:	DUKE POWER CO.
To:
Shared Package
ML19340A120	List: ML19340A118 ML19340A124 ML19340A125
References
NUDOCS 7911250048
Download: ML19340A125 (4)

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ATTAC E NT 2 PROPOSED TECHNICAL SPECIFICATIONS CHANGES FOR OCONEE NUCLEAR STATION l

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TABLE 4.1-3 . -

'HINIMUM SAMPLING FREQUENCY-Item Check' Frequency

.l. Reactor Coolant a. Gamma Isotopic Analysis a. -Monthly *-

b. ! Radiochemical Analysis for b. . Monthly *-

Sr.89, 90 ,

c. Tritium ~ c. Monthly *-

d. . Gross Beta & Gamma A( .ivity (1) d. 5 times / week * -

c.- Chemistry (C1, F and 02) e. 5 times / week

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f. Boron Concentration f. 2 times / week **

g. Groes Alpha Activity g. Monthly *'

y h. E Determination (2) h. Semi-annually

. q.

g 2. Borated Water Storage Boron Concentration Weekly

• and ' af ter Tank Water Sample each makeup

3. ' Core Flooding Tank Boron Concentration Monthly

• and after each makeup

4. Spent Fuel Pool' Water- Boron Concentration Monthly *** and after-Sample each makeup

5. Secondary Coolant a. Gross Beta & Gamma Activity- a. Weekly *

b. Iodine-Analysis (3)

6. Concentrated Boric Acid Borot. Concentration-Twice weekly

• Tank

• Not applicable if reactor is in a cold shutdown condition for a period. exceeding the sampling frequency.

• • Applicable.only when fueltis in the reactor. -

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• • • Applicable only when fuel is in wet storage in.the spent fuel pool. I

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'5.4 NEW AND SPENT FUEL STORAGE FACILITIES Specification-

5. 4.1 ' . New Fuel Storage 5.4.1.1- New fuel will normally be stored'in the spent-fuel pool serving the respective unit.

In the spent fuel pool serving Units 1 and 2, the fuel assemblies are stored in racksJin parallel rows, having a nominal center-to-center distance of 21 inches in both directions. This spacing .is sufficient to maintain a K effective of less than 0.9 when flooded with unborated wgger, based on fuel with an enrichment of 3.5 weight percent U

.In the spent fuel pool serving. Unit 3, the fuel assemblies are stored in racks consisting of stainless steel cavities which maintain a minimum edge-to-edge spacing of 3.95 inches between adjacent fuel assemblies. The neutron poisoning effect of the storage cavity material combined with the minimum 3.95 inenes edge-to-edge spacing between adjacent fuel assemblies is sufficient to maintain a K effective of ased on less than an fuel with 0.95 when flooded enrichment with of 3.5 unborated weight watef35 percent U or the equivalent.

3 5.4.1.2 New fuel may also be stored in the fuel transfer canal.

The fuel ussemblies are stored in five racks in a row having a nominal center-to-center distance-of 2' 1-3/4".

One rack is oversized.to receive a failed fuel assembly container. The other four racks are normal size and are capable of receiving new fuel assemblies.

5.4.1.3 New fuel may also be stored in shipping containers.

5.4.1.4 New fuel of enrichment not exceeding 2.9 weight percent U-235 or the equivalent may be placed in dry storage in Unit 3 fuel storage racks in a checkerboard' pattern, with fuel assemblies occupying only diagonally adjacent storage locations. This configuration is sufficient to ensure a K effective of less than 0.9 at all times.

5.4.2 Spent Fuel Storage 5.4.2.1 ' Irradiated fuel assemblies will be stored, prior to of fsite shipment, in a stainless steel lined spent fuel pool.

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.:The spent fuel pool serving Units 1 and 2 is sized.co accommodate a full core of. irradiated fuel assemblies in '

addition to.the-concurrent storage of.the largest quantity

~o f new and spent fuel assembliesLpredictediby the fuel '

-management-program.

Provisions are made in'the Unit'3' spent fuel pool to accommodate up to 474 fuel l assemblies.

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. 5.4.2.2- -Spent fuel'may-also be' stored in storage racks in the fuel transfer canal'when the' canal is at refueling level.

5.4.3: Except as provided:in Specification l5.4.1.4, whenever there- Ji'

" is fuel.in'the pool, the spent = fuel pool is. filled'with I water' borated to the concentration that is used in the- ' +4 reactor cavity and fuel transfer canal during refueling-operations.

-5.4.4-

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. The' spent. fuel pool and fuel transfer canal racks are-designed for'an earthquake force of 0.lg ground motion.

- REFERENCES

" $ ~ FSAR, Section 9.7 s

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