ML18052A295

Proposed Changes to Design Features Section of Tech Specs, Increasing Storage Capacity of Spent Fuel Pool by Installing New Spent Fuel Storage Racks

ML18052A295
Person / Time
Site:	Palisades
Issue date:	02/20/1986
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18052A293	List: ML18052A292 ML18052A294 ML18052A295 ML18052A296
References
NUDOCS 8602260325
Download: ML18052A295 (5)

Text

ATTACHMENT II Consumers Power Company Palisades Plant Docket 50-255 PROPOSED TECHNICAL SPECIFICATIONS PAGE CHANGES SPENT FUEL POOL STORAGE CAPACITY EXPANSION a60226032s a6o22o PPDR ADOCK 05000255 PDR IC 1185-0324-1\\1104 February 20, 1986 4 Pages

r Table 4.2.1 Minimum Frequencies for Sampling Tests (l)A daily sample shall be obtained and analyzed if fission product monitor is out of service.

(2)After at least 2 EFPD and at least 20 days since the last shutdown of.

longer than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

C4)When iodine or particulate radioactivity levels exceed 10 percent of limit in Specification 3.9.6 and 3.9.9 the sampling frequency shall be increased to a minimum of once each day.

(S)If the air ejector gas monitor is out of service, the secondary coolant gross radioactivity shall be measured once per day to evaluate steam generator leak tightness.

(6)Reference Specification 3.8.5 for maximum bulk water temperature and monitoring requirements.

(?)Reference Bases section of Specification 3.8 and Section 5.4.2f of the Design Features for minimum boron concentration(~ 1720 ppm).

4-14b Proposed TSP1185-0324-NL04

5.4.2 Spent Fuel Storage *

a.

Irradiated fuel bundles will be stored, prior to off-site shipment in the stainless steel-lined spent fuel pool.

b.

(Deleted)

c.

The spent fuel storage pool and spare (north) tilt pit are divided into two regions identified as Region I and Region II as illustrataed in Figure 5.4-1.

Reg~on I racks are designed and shall*be maintained with a nominal 10.25" center-to-center distance between fuel assemblies with the exception of the single Type E rack which has a nominal 11.25" center-to-center distance between fuel assemblies.

The Region I spent fuel storage racks are designed such that fuel having a maximum U-235 loading of 41.24 grams of U-235 per axial centimeter placed in the racks would result in a K ff equivalent to ~ 0.95 when flooded with unborated water.

Tfie K ff of ~ 0.95 includes a conservative allowance for uncertainfies.

d.

Region II racks have a 9.17 inch center-to-center spacing.

Because of this smaller spacing, strict controls 'are employed to evaluate burnup of the fuel assembly prior to its placement in Region II cell locations.

Upon determination that the fuel assembly meets the burnup requirements of Table 5.4-1, placement in a Region II cell is authorized.

These positive controls assure the fuel enrichment limits assumed in the safety analyses will not be exceeded.

e.

After installation of the two-region high density spent fuel racks, the maximum loading for fuel assemblies in the spent fuel racks is 41.24 grams per axial centimeter of U-235 average enrichment.

f.

The minimum spent fuel pool water boron concentration shall be 1720 ppm.

Boron concentration shall be verified at least once monthly.

g.

The spent fuel racks are designed as a Class I structure.

h.

Spent fuel shipping casks shall not be moved into the fuel storage building until such time as the NRC has review~d and approved the spent fuel cask drop evaluation.

i.

Storage in Region II of the spent fuel pool and spare (north) tilt pit shall be restricted by burnup and enrichment limits specified in Table 5.4-1.

NOTE:

Until needed for fuel storage, one Region II rack in the northeast corner of the spent fuel pool may be removed and replaced with the cask anti-tipping device.

References FSAR Update Chapter 5 FSAR Update Chapter 9 TSP1185-0324-NL04 Proposed 5-4a

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Region II 11 x 11 W-1 Region II 11 x 11 W-2 MAIN f90l FIGURE 5. 4-1 SPENT FUEL POOL ARRANGEMENT

Initial w/o 1.5

1. 75 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.5 TABLE 5.4-1 Spent Fuel Burnup Requirements for Storage in Region II of the Spent Fuel Pi~

Discharge Burnup GWD/MT.

To be provid*ed when analysis is complete.

Linear interpolation between two consecutive points will yield conservative results.

Proposed 5-4c TSP1185-0324-NL04