ML20207J083

Proposed Tech Specs for Trojan Isfsi,Stating Length of Time Air Pads Can Be Installed & Inflated

ML20207J083
Person / Time
Site:	Trojan  File:Portland General Electric icon.png
Issue date:	02/11/1999
From:	PORTLAND GENERAL ELECTRIC CO.
To:
Shared Package
ML20207J073	List: ML20207J070 ML20207J078 ML20207J083 ML20207J095
References
NUDOCS 9903160187
Download: ML20207J083 (20)

Text

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Enclosure 2 l

VPN-021-99 February 11,1999 O Independent Spent Fuel Storage Installation Technical Specification Update

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9903160187 990211 PDR ADOCK 05000344 Y PDR .,

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Summary and Description of Changes to Troian ISFSI Technical Specifications Page1of1 No. Page Section Description of Change 1 ii Table of Contents Added LCO and SR for AIR PADS.

2 iii Table of Contents' Repagination because of added specifications on previous page.

3 iv Iist of Effective Pages Revised to reflect updated pages included in this enclosure.

4 1.1-1 Definitions Added a new definition for AIR PADS. j 5 1.1-2 Definitions Repagination because of new definition for AIR PADS.

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1.1-4 6 3.4 1 LCO 3.4.1 and SR Added new specifications for the AIR PADS.

3.4.1.1 and 3.4.1.2 4

7 4.0-3 4.3.1 Added BASKET OVERPACK to title since same standard applies to I it.

8 4.0-3 4.3.2.1 Added new section to reflect deviations from CONCRETE CASK design standard.

l 9 4.0-3 4.3.3 Moved construction / fabrication exceptions to a new section to and encompass the CONCRETE CASKS as well as the PWR BASKET 4.0-4 and BASKET OVERPACK.

10 4.0-5 Table 4-1 Repagination because of addition of new table listing CONCRETE and CASK design standard deviations.

4.0-6 11 4.0-7 Table 4-2 Added new table listing the CONCRETE CASK Code Deviations.

12 4.0-8 Figure 4-1 Repagination because of addition of new table listing CONCRETE CASK design standard deviations.

13 B3.4-1 BASES Added new Bases for the AIR PADS.

to B3.4-3 i

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, INSTRUCTION SHEET The following information is provided as a guide for the insertion of new sheets for changes to -

the " Trojan Independent Spent Fuel Storage Installation Technical Specifications," dated February 11,1999.

. Remove' Insert Table of Contents Table of Contents Pages ii through iii Pages ii through iii List of Effective Pages. List of Effective Pages Page iv Page iv Section 1.0 Section 1.0 Pages 1.1-1 through 1.1-4 Pages 1.1-1 through 1.1-4 Section 3.0 Section 3.0 None Page 3.4-1 Section'4.0 Section 4.0 Pages 4.0-3 through 4.0-6 Pages 4.0-3 through 4.0-8 O Bases Bases None Pages B3.4-1 through B3.4-3 O

TABLE OF CONTENTS O 1.0 USE AND APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1-1 1.1 De finitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 - 1 1.2 Logical Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2-1 1.3 Completion Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3- 1 1.4 Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4- 1 2.0 FUNCTIONAL AND OPERATING LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0-1 2.1 Functional and Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0-1

. 2.2 Functional and Operating Limits Violations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0-2

-Table 2-1 Spent Fuel Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 Table 2-2 Fuel Assembly Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0-4 1

3.0 LIMITING CONDITIONS FOR OPERATION (LCO) APPLICABILITY . . . . . . 3.0-1 j 3.0 SURVEILLANCE REQUIREMENTS (SR) APPLICABILITY . . . . . . . . . . . . . . 3.0-2 g 3.1 PWR BASKET Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 -1 3.1.1 PWR BASKET Shield Lid Weld Helium Leak Rate . . . . . . . . . . . . 3.1-1 3.1.2 PWR BASKET Vacuum Drying Pressure . . . . . . . . . . . . . . . . . . . . 3.1-3 3.2 TRANSFER CASK Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2-1 3.2.1 TRANSFER CASK Ambient Air Temperature Limits . . . . . . . . . . 3.2-1 3.3 - Radiation Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3-1 3.3.1 CONCRETE CASK Removable Surface Contamination . . . . . . . . 3.3-1 i 3.3.2 TRANSFER CASK Removable Surface Contamination . . . . . . . . 3.3 3.4 AIR PADS ....................................................... 3.4-1 l 3.4.1 AIR PAD Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4- 1 l i

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'4.0 - DESIGN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0-1 4.1 Site..............................................................4.0-1  !

4.1.1 . Site Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0-1 4.2 - Storage Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0- 1 4.2.1 Storage System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0- 1 l

.4.2.2 Storage Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0-1 4.2.3 - Storage Pad, Service Pad, and TRANSFER STATION . . . . . . . . . 4.0-2 b\

Trojan ISFSI ii 2/11/99

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TABLE OF CONTENTS 4.3 Codes and Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0-3 l

l 5.0 ADMINISTRATIVE CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1-1 5.1 Responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 - 1

! 5.2 . Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2- 1 5.3 ISFSI Staff Qualifications . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 5.3-1 i 5.4 - Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4- 1 5.5 Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 - 1 5.6 High Radiation Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.6-1 C

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Trojan ISFSI iii 2/11/99 i

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r LIST OF EFFECTIVE PAGES sO Eage Revision Technical Soecifications All pages except the following: 1/22/99 ii through iv 2/11/99 1.1-1 through 1.1-4 2/11/99

. 3.4-1 2/11/99 4.0-3 and 4.0-4 2/11/99 4.0-5 and 4.0-6 (Table 4-1) 2/11/99 4.0-7 (Table 4-2) 2/11/99 4.0-8 (Figure 4-1) 2/11/99 BasM All pages except the following: 1/22/59-B 3.4-1 through B 3.4-3 2/11/99 l

Trojan ISFSI iv 2/11/99 l

Def'mitions 10 USE AND APPLICATION l.1 .' Definitions NOTE. -

'Ibe defined terms of this section appear in capitalized type and are applicable throughout these Trojan ISFSI Technical Specifications and Bases.

IGM Definition ACTIONS ACTIONS shall be that part of a Specification that prescribes Required Actions to be taken under designated Conditions within specified Completion Times.

- AIR PADS The AIR PADS are commercially available lifting devices that are l used to move the CONCRETE CASKS. The AIR PADS consist l of four air bladders that are inserted into the CONCRETE CASK l sir inlets and are inflated to lift a CONCRETE CASK up to four l inches off the surface which then allows it to be moved. l BASKET OVERPACK ' The BASKET OVERPACK is the welded container which is designed to provide a Confinement Boundary in the event of a PWR BASKET failure.

CONCRETE CASK The CONCRETE CASK is the structure in which a PWR BASKET and a BASKET OVERPACK are stored.

DAMAGED FUEL DAMAGED FUEL are fuel assemblies which can be handled by normal means: (1) wi:h known or suspected cladding defects greater than pinhole leaks or hairline or (2) with missing fuel rods that are not replaced with dummy fuel rods. Fuel assemblies which cannot be handled by normal means due to fuel cladding damage are considered to be FUEL DEBRIS. DAMAGED FUEL is stored in FAILED FUEL CANS.

FAILED FUEL CAN FAILED FUEL CANS are specially designed enclosures for DAMAGED FUEL, FUEL DEBRIS, and PROCESS CAN CAPSULES. FAILED FUEL CANS are stored in a PWR BASKET.

Trojan ISFSI 1.1-1 2/11/99

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Definitions  !

1.0 USE AND APPLICATION 1.1 Definitions

~ FUEL DEBRIS FUEL DEBRIS is fuel with known or suspected defects, such as

ruptured fuel rods, severed rods, or loose fuel pellets and fuel pellet fragments. . FUEL DEBRIS includes fuel assembly metal fragments such as portions of fuel rods and grid assemblies. Fuel assemblies which cannot be handled by normal means due to fuel cladding damage are considered to be FUEL DEBRIS. FUEL DEBRIS is stored in PROCESS CAN CAPSULES which are L stored in FAILED FUEL CANS or directly in FAILED FUEL j CANS depending upon the extent of damage.

l INDEPENDENT SPENT The facility within the perimeter fence licensed for storage of spent FUEL STORAGE fuel within CONCRETE CASKS, I ' INSTALLATION (ISFSI) l INTACT FUEL INTACT FUEL- ASSEMBLIES are fuel assemblies which can be ASSEMBLY - handled by normal means: (1) without known or suspected cladding defects greater than pinhole leaks or hairline cracks; or (2) with missing fuel rods which are replaced by dummy rods. Fuel -

assemblies from which fuel rods arc missing shall not be classified as INTACT CUEL ASSEMBLIES unless dummy fuel rods are used to displace an amount of water equal to that displaced by the

. original fuel rod (s).

1 L LOADING OPERATIONS LOALING OPERATIONS include d:ose licensed activities performed on a PWR BASKET while it is being loaded with l- INTACT FUEL ASSEMBLIES, DAMAGED FUEL, or FUEL l DEBRIS, and on a CONCRETE CASK while it is being loaded l with a PWR BASKET containing INTACT FUEL ASSEMBLIES,

j. DAMAGED FUEL, or FUEL DEBRIS. LOADING OPERATIONS begin when the first INTACT FUEL ASSEMBLY, DAMAGED FUEL, or FUEL DEBRIS, is lowered into the PWR l- BASKET and ends when the CONCRETE CASK is ready for "

TRANSPORT OPERATIONS.

' PROCESS CAN. PROCESS CAN CAPSULES are sealed, inerted canisters CAPSULE . containing FUEL DEBRIS. PROCESS CAN CAPSULES are stored in FAILED FUEL CANS.

l Trojan ISFSI 1.1-2 2/11/99 l 1

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I' Definitions 1.1 1.0 USE AND APPLICATION l .1 - Definitions PWR BASKET- The PWR BASKET is the stainless steel welded container ,which is designed for storage and transportation ofINTACT FUEL ASSEMBLIES and FAILED FUEL CANS which contain ~ '

DAMAGED FUEL and FUEL DEBRIS.

L STORAGE OPERATIONS STORAGE OPERATIONS include all licensed activities that are l . performed at the ISFSI while a CONCRETE CASK contairdng a _

L PWR BASKET or a BASKET OVERPACK with INTACT FUEL- 1 L

ASSEMBLIES, DAMAGED FUEL, and FUEL DEBRIS, is 1 located on the storage pad within the ISFSI perimeter including movement of and use of the TRANSFER CASK, BASKET OVERPACK, or a shipping cask on the storage pad.  ;

TRANSFER CASK The TRANSFER CASK is used to lift and transport a PWR BASKET in the Fuel Building and support a PWR BASKET at the O TRANSFER STATION.

TRANSFER STATION The TRANSFER STATION is a steel stmeture, located on the -

, Transfer Pad, to the west of the storage pad, designed to safely .

L ' facilitate loading the PWR BASKET into a shipping cask or BASKET OVERPACK.

TRANSPORT TRANSPORT OPERATIONS include those activities involving OPERATIONS movement of a CONCRETE CASK loaded with a PWR BASKET containing INTACT FUEL ASSEMBLIES, DAMAGED FUEL, or l-

- FUEL DEBRIS. TRANSPORT OPERATIONS begin when the l CONCRETE CASK is first moved from the Fuel Building i' following LOADING OPERATIONS and ends when the CONCRETE CASK is at its storage location within the ISFSt.

UNLOADING UNLOADING OPERATIONS include activities performed OPERATIONS on a PWR BASKET to be unloaded of the contained INTACT FUEL ASSEMBLIES or FAILED FUEL CANS. UNLOADING  !

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OPERATIONS begin when actions have commenced to relocate Trojan ISFSI ' 1.1-3 2/11/99 l

l Definitions 1.1 1.0 USE AND APPLICATION 1.1 Definitions the PWR BASKET to the Cask Loading Pit and ends when the last INTACT FUEL ASSEMBLY or FAILED FUEL CAN has been I removed from the PWR BASKET.

O l Trojan ISFSI 1.1-4 2/11/99 b i

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AIR PAD Limits l 3.4.1 l

'k ' 3.4 ' AIR PADS l l

3.4.1 AIR PAD Limits

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LCO 3.4.1 'Ihe AIR PADS shall not be installed under a CONCRETE CASK containing a l 'l

' loaded PWR BASKET: l l

a. For more than 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> in a 24-hour period, or l

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. b. When the ambient air temperature is greater than 75*F. l l

1 APPLICABILITY: LOADING, TRANSPORT, and STORAGE OPERATIONS. l g . _.

ACTIONS l I

CONDITION ~ REQUIRED ACTION COMPLETION TIME l A. AIR PADS installed for A.1 Remove the AIR PADS. Immediately l mom than 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> in a l 24-hour period.

B. Ambientairtemperature B.1 Remove the AIR' PADS. Immediately l greater than 75"F. l l l l

SURVEILLANCE REQUIREMENTS l

.I SURVEILLANCE FREQ'UENCY l j

. SR 3.4.1.1 Verify the AIR PADS are not installed for mom Hourly when the AIR PADS l than 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> in a 24-hour period. are installed. l SR 3.4.1.2 Verify ambient air temperature is less than or Once within one hour before l l

equal to 75'F. installation and hourly when l i the AIR PADS are installed. l l

l TrojanISFSI 3.4-1 2/11/99

Design Features 4.0 DESIGN FEATURES 4.3 Codes and Standards 4.3.1 PWR BASKET and BASKET OVERPACK l 4.3.1.1 The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section III,1992 Edition with Addenda through 1994, is the goveming Code for the PWR BASKET and BASKET OVERPACK Storage System used at Trojan.

4.3.1.2 Design Exceptions to Codes, Standards, and Criteria

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Table 4-1 lists approved exceptions for the design of the ISFSI.

I 4.3.2 CONCRETE CASK l

4.3.2.1 The goveming Codes for the CONCRETE CASKS used at the Trojan l ISFSI are American Concrete Institute (ACI) 349, Code Requirements for l Nuclear Safety Related Concrete Structures,1985 Edition, and American l O National Standards Institute (ANSI) 57.9, Design Criteria for an Independent Spent Fuel Storage Installation (Dry Storage Type),1984 l

l Edition. l l

4.3.2.2 Design Exceptions to Codes, Standards, and Criteria l l

Table 4-2 lists approved deviations for the design of the ISFSI l CONCRETE CASKS. l 4.3.3 Construction / Fabrication Exceptions to Codes. Standards. and Criteria l Proposed alternatives to ASME Code,Section III,1992 Edition with Addenda through 1994, including exceptions allowed by Section 4.3.1.1, and deviations l from ACI-349,1985, or ANSI N57.9-1984, may be used when authorized by the l Director of the Office of Nuclear Meterial Safety and Safeguards or designee. ,

-The licensee should demonstrate that: i

1. The proposed alternatives would provide an acceptable level of quality and safety, or TrojanISFSI 4.0-3 2/11/99

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% Design Features 4.0 DESIGN FEATURES

! 2. Compliance with the specified requirements of ASME Code Section III,1992 Edition with Addenda through 1994, or with l ACI-349,1985, or with ANSI N57.9-1984, would result in l hardship or unusual difUculty without a compensating increase in the level ofquality and safety.

Requests for reliefin accordance with this section shall be submitted in accordance with 10 CFR 72.4.

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/O Table 4-2 Concrete Cask Code Deviations' Code Section Requirement Exception / Justification

' No.

1.2 Specifies how drawings and The loads used in the design are covered in calculations must be handled the calculations rather than the drawings and specifications.

A.4 The limits for bulk (150"F) & local A long term temperature limitation of area (200 ) concrete temperature. 225 F is used his increased limit is based . . . -

on test data from several research efforts which show that concrete of similar composition to that used in the casks does not suffer loss of strength when exposed to temperatures up to 350 F.

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8 Deviations are from ACI-349. l l

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Trojan ISFSI 4.0-8 2/11/99 L-

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AIR PAD Limits l B 3.4.1 l B 3.4 AIR PADS l l

B 3.4.1 AIR PAD Limits l l

BASES 1

. BACKGROUND The AIR PADS are used to move CONCRETE CASKS (References 1 and l 2). The AIR PADS are inserted into the air inlets at the bottom of the l CONCRETE CASK. Air compressors are used to inflate and maintain l pressure in the AIR PADS. The inflated AIR PADS lift the CONCRETE 'l CASK above the ground and allow it to float on a cushion of air. ' A l transport vehicle is connected to the CONCRETE CASK to move it. l 1

s When installed, the AIR PADS partially block the CONCRETE CASK air l inlets and reduce the cooling air flow. However, when the AIR PADS are l inflated, for analysis purposes, it is assumed that all air flow is blocked l even though there is some natural circulation through an unblocked l opening and forced air flow from the AIR PAD itself. In either case (i.e., l AIR PADS installed or inflated), although the air flow from natural draft l air flow or forced air flow, respectively, will provide cooling, the extent of l that cooling has not been determined. l APPLICABLE The CONCRETE CASK Sulk concrete temperature is the limiting thermal l SAFETY design parameter (References 3 and 6). Because of the temperature l JANALYSIS gradient across the concrete, the bulk concrete temperature is difficult to l determine and use in analyses. Therefore, the inner concrete temperature is l used in lieu of the bulk concrete temperature and is limited to 225'F for l

. long-term normal operational storage (Reference 3). This is conservative j since the bulk concrete temperature will not exceed the inner concrete I l

temperature. l 1

In the Full Blockage of Air Flow case in the SAR (Reference 4), which l .

assumes complete air flow blockage of all inlets and all outlets, for a l ]

CONCRETE CASK loaded - M a PWR BASKET with a 26 kW heat load, l

the inner concrete temperature will increase, reaching the long-term normal l operation storage limit of225 *F in approximately 9.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />, the short-term l off-normal limit of 300*F in approximately 21 hours2.430556e-4 days <br />0.00583 hours <br />3.472222e-5 weeks <br />7.9905e-6 months <br />, and the short-term l 3 accident limit of 350 F in approximately 31.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> (Reference 3). In ]

order to prevent the inner concrete temperature from reaching the long-term l

'A.

-(/ Trojan ISFSI' B 3.4-1 2/11/99 '

{_

AIR PAD Limits l B 3.4.1 ~l B 3.4 AIR PADS -

I

. B 3.4.1' AIR PAD Limits l 1

BASES l

normal storage limit, installation of the AIR PADS will be restricted to no l more than 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> in any 24-hour period. The Full Blockage of Air Flow l c se in the SAR assumes an initial ambient air temperature of 75 *F; l therefore, a 75'F temperature limit is placed upon installation and use of 'l the AIR PADS on a loaded CONCRETE CASK. 'l l

In the Blockage of One-Half of the Air Inlets case in the SAR (Reference - l-w 5), which assumes blockage of one-half of the air inlets, for a CONCRETE l' CASK loaded with a PWR BASKET with a 26 kW heat load, the inner l concrete temperature will not reach the long-term storage limit of 225*F . l This analysis also assumes an initial ambient air temperature of 75*F. l l

l l

LCO Restricting installation of the AIR PADS to no more than 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> in a 24-l O hour period ensures that the long-term inner concrete storage temperature is not exceeded and that the CONCRETE CASK is not adversely affected.

l l

l l l )

Restricting the installation of the AIR PADS on a loaded CONCRETE l CASK to periods when the ambient air temperature is less than or equal to l 75 *F ansures that the long-term inner concrete storage temperature is not l exceeded regardless of the PWR BASKET heat load (the actual heat load is l less than the design heat load of 26 kW). l l l l I  !

l APPLICABILITY 'Ihe loaded CONCRETE CASKS will only be moved in LOADING, l t TRANSPORT, or STORAGE OPERATIONS. Therefore, this LCO and l SR are only applicable during these conditions. l l

l <

l-ACTIONS A1 l l

If the AIR PADS are installed for more than 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> in a 24-hour period, l TrojanISFSI B 3.4-2 2/11/99 l

l L

AIR PAD Limits l O

(). B 3.4 AIR PADS B 3.4.1 l l )

1 B 3.4.1 AIR PAD Limits l l

BASES l j the AIR PADS must be immediately removed. This will reestablish air l l flow to cool the concrete. i )

l {

El 'l 1

If ambient air temperature exceeds 75 F, the AIR PADS must be l j immediately removed. This will reestablish air flow to cool the concrete l.

and stay within analyzed limits. Although all of the AIR PADS will be' - --l-removed, the safety analysis has shown that blockage of one-half of the air l inlets, which is more conservative than (but similar to) the case of two of l the AIR PADS installed, does not lead to adverse concrete temperatures l (Reference 5). ,

l 1

p)

(

SURVEILLANCE SR REQUIREMENTS 3.4.1.1 'l l

Since the long term integrity of the concrete is ensured by maintaining its l temperature below the specified linP.s, the length of time during which the l AIR PADS can be installed is ir , xM hourly while they are installed. l

' l SR 3.4.1.2 I I

Similarly, the ambient air temperature is monitored hourly l l

i i REFERENCES 1. SAR Section 5.1.1.3 l l

2. SAR Section 5.2.1.1.7 l j

3. SAR Table 4.2-12 l

4. SAR Section 8.2.7 l ,

5. SAR Section 8.1.2.2 l  !

6. SAR Table 4.2-2a l l l l

. Trojan ISFSI B 3.4-3 2/11/99 k.