ML20034B491

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Proposed Tech Specs 5.6.1(a) & 5.3.1 Re Fuel Storage Racks & Fuel Enrichment in Reactor Core
ML20034B491
Person / Time
Site: Millstone Dominion icon.png
Issue date: 04/10/1990
From:
NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20034B489 List:
References
NUDOCS 9004270247
Download: ML20034B491 (8)
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Qgeket No. 50 336-S13475 t

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Millstone Nuclear Power Station, Unit No.' 2 Proposed Change to Technical Specifications Fuel Enrichment Limits j

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DESIGN FEAT'RES U

DESIGN PRESSURE AND TEMPERATURE 5.2.2 The reactor containment building is designed and shall be maintained for a maximum internal pressure of 54 psig and a temperature of 289'F.

PENERATIONS 5.2.3 penetrations through the reactor containment building are designed and shall be maintained in accordance with the original design provisions contained in Section 5.2.8 of the FSAR with allowance for normal degradation pursuant to the applicable Surveillance Requirements.

5.3 REACTOR CORE FVEL ASSEMBLIES 5.3.1 The reactor core shall contain 217 fuel assemblies with each fuel assembly containing 176 rods.

Reload fuel shall be similar in physical design to the initial core loading and shall have a maximum enrichment of 4.5 weight l

percent of U-235.

CONTROL ELEMENT ASSEMBLIES 5.3.2 The reactor core shall contain 73 full length and no part length control element assemblies.

The control element assemblies shall be designed and maintained in accordance with the original design provisions contained in Section 3.0 of the FSAR with allowance for normal degradation pursuant to the applicable Surveillance Requirements.

5.4 REACTOR COOLANT SYSTEM

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DESIGN PRESSVRE AND TEMPERATURE 5.4.1 The reactor coolant system is designed and shall be maintained:

a.

In accordance with the code requirements specified in Section 4.2.2 of the FSAR with allowance for normal degradation pursuant of the applicable Surveillance Requirements, b.

For a pressure of 2500 psia, and c.

For a temperature of 650*F except for the pressurizer which is 700'F.

I MILLSTONE - UNIT 2 5-4 Amendment No. M, 139

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op DESIG'N FEATURES VOLUME 5.4.2 The total water and steam volume of the reactor coolant system is 10,060 + 700/-0 cubic feet.

5.5 EMERGENCY CORE COOLING SYSTEMS 5,5.1 1he emergency core cooling systems are designed and shall be maintained in accordance with the ori inal design provisions contained in Section 6.3 of the F5AR with allowance or normal :lyradation pursuant to the applicable Surveillance Requirements.

5.6 FUEL STORAGE CRITICAllTY 5.6.1 a)

The new fuel- (dry) storage racks are designed and shall be maintained with sufficient center to center distance between assemblies to ensure e k is4.5weiM[i.95.

The maximum fuel enrichment to be stored in these racks percent of U 235.

l b)

Region I of the spent fuel storage pool is designed and shall be maintained with a nominal 9.8 inch center to center distance between storage locations te ensure a K 1 95 with the storage pool filled with unborated water.

Fuel assemblielffstored in this region may have a maximum fuel enrichment of 4.5 weight percent of U-235.

Consolidated fuel storage boxes may also be stored in this region, c)

Region 11 of the spent fuel storage pool is designed and shall be maintained with a 9.0 inch center to center distar.ce between storage locations to ensure a K f

5.95 with the storage pool filled with unborated water.

Fuel assemblie! [tored in this region must comply with Figure 3.91 to ensure that at least 85% of the design burn up has been sustained.

The contents of consolidated fuel storage boxes to be stored in this region must comply with Figure 3.9-3.

i d)

Region II of the spent fuel storage pool is designed to permit storage of consolidated fuel in the 4th location of the storage rack and ensure a K s 0.95.

Placement of consolidated fuel in the 4th location is only permifNd if all surrounding cells of the STORAGE PATTERN are occupied by consolidated fuel.

DRAINAGE 5.6.2 The spent fuel storage pool is designed and shall be maintained to prevent inadvertent draining of the pool below elevation 22'6".

CAPACITY 5.6.3 The spent fuel storage pool is designed and shall be maintained with a storage capacity limited to no more than 384 storage locations in Region I and 962 storage locations in Region 11 for a total fo 1346 storage locations.*

  • This translates into 1277 storage locations to receive spent fuel.and 69 storage locations to remain blocked.

MILLSTONE - UNIT 2 5-5 Amendment No. Ep, S, 7pJl, 117 i

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i Dacket No. 50-336 B13475 f

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Millstone Nuclear Power Station, Unit No. 2 Advanced Nuclear Fuels -ANF-88-020

" Final Report--Criticality Safety Analysis, Millstone 2 i

New Fuel Storage Vault and Transfer Carriage l

With 5.0 Percent Enriched 14 x 14 Fuel Assemblies" l

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' DESIGN FEATURES DESIGN PRESSURE AND TEMPERATURE 5,2.2 The reactor' containment building is designed and shall be maintained for a maximum internal pressure of 54 psig and a temperature of 289'F.

PENETRATIONS 5.2.3 Penetrations through the reactor containment building are designed and shall be maintained in accordance with the original design provisions contained in Section 5.2.8 of the FSAR with allowance foi normal degradation pursuant to the applicable Surveillance Requirements.

5.3 REACTOR CORE FUEL ASSEMBLIES 5.3.1 The' reactor core shall contain 217 fuel assemblies with each fuel assembly containing 176 rods. Reload fuel shall be similar in physical design to the initial core loading and shall have a maximum enrichment of 4.5 weight l

percent of U 235.

CONTROL ELEMENT ASSEMBLIES 5.3.2 The reactor core shall contain 73 full length and no part length control element assemblies.

The control element assemblies shall be designed and maintained in accordance with the original design provisions contained in Section 3.0 of the FSAR with allowance for normal degradation pursuant to the applicable Surveillance Requirements.

5.4 REACTOR COOLANT SYSTEM DESIGN PRESSURE AND TEMPERATURE l

5.4.1 The reactor coolant system is designed and shall be maintained:

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a.

In accordance with the code requirements specified in Section 4.2.2 of the FSAR with allowance for normal degradation pursuant of the applicable Surveillance Requirements, j

1 b.

For a pressure of 2500 psia, and c.

For a temperature of 650'F except for the pressurizer which.is-700*F.

i MILLSTONE - UNIT 2 5-4 Amendment No. M, 139

DESIGN FEATURES VOLUME 5.4.2 The total water and steari volume of the reactor coolant system is 10,060 + 700/ 0 ct,bic feet.

1.E EMERGENCY CORE COOLING SYSTEMS 5.5.1 The emergency core cooling systems are designed and shall be maintained in accordance with the original design provisions contained in Section 6.3 of the FSAR with allowance for normal degradation pursuant to the applicable Surveillance Requirements.

5.6 FUEL STORAGE CRITICALITY 5.6.1 a)

The new fuel (dry) storage racks are designed and shall be maintained with sufficient center to center distance between assemblies to ensure a k The maximum fuel enrichment to be stored in these racks is 4.5 weik p<er.95.

cent of U-235.

l b)

Region I of the spent fuel storage pool is designed and shall be maintained with a nominal 9.8 inch center to center distance between storage locations to ensure a K assembliefff s.95 with the storage pcol filled with unborated water.

Fuei stored in this region may have a maximum fuel enrichment of 4.5 weight percent of U 235.

Consolidated fuel storage boxes may also be stored in this region, c) Region 11 of the spent fuel storage pool is designed and shall be maintained with a 9.0 inch center to center distance between storage locations to ensure a K Fuel assemblieffr s.95 with the storage pool filled with unborated water.

itored in this region must comply with Figure 3.9-1 to ensure that at least 85% of the design burn up has been sustained.

The contents of consolidated fuel storage boxes to be stored in this region must comply with Figure 3.9 3.

d)

Region 11 of the spent fuel storage pool is designed to permit storage of consolidated fuel in the 4th location of the storage rack and ensure a K

< 0.95.

Placement of consolidated fuel in the 4th location is only permiN[d if all surrounding cells of the S10 RAGE PATTERN are occupied by

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consolidated fuel.

DRAINAGE 5.6.2 The spent fuel storage pool is designed and shall be maintained to prevent inadvertent draining of the pool below elevation 22'6".

CAPACITY 5.6.3 The spent fuel storage pool is designed and shall be maintained with a storage capacity limited to no more than 384 storage locations in Region 1 and 962 storage locations in Region 11 for a total fo 1346 storage locations.*

  • This translates into 1277 storage locations to receive spent fuel and 69 storage locations to remain blocked.

MILLSTONE - UNIT 2 55 Amendment No. Ep, EE, 799,117

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s Docket No.10-336 J[13475 Millstone Nuclear Power Station,. Unit No. 2 Advanced Nuclear Fuels--ANF-88 028.

" Final Report -Criticality Safety Analysis, Millstone 2.

New Fuel Storage Vault and Transfer Carriage With 5.0 Percent Enriched 14 x 14 Fuel Assemblies" I -

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April 1990 4

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