ML24141A274
| ML24141A274 | |
| Person / Time | |
|---|---|
| Site: | 07201026 |
| Issue date: | 05/23/2024 |
| From: | Storage and Transportation Licensing Branch |
| To: | Westinghouse |
| Shared Package | |
| ML24141A254 | List: |
| References | |
| EPID L 2020-RNW-0035, CAC 001028 | |
| Download: ML24141A274 (1) | |
Text
TECHNICAL SPECIFICATION
FOR THE FuelSolutions' W21 CANISTER
to be used concurrent with
the Storage System Technical Specification
Renewed Amendment 4
Appendix B TABLE OF CONTENTS Page
1.0 USE AND APPLICATION............................................ 1.1-1
1.1 Definitions......................................................... 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............................... 2.0-1
3.0 LIMITING CONDITION FOR OPERATION (LCO) APPLICABILITY........ 3.0-1
3.0 SURVEILLANCE REQUIREMENT (SR) APPLICABILITY................ 3.0-2
3.1 CANISTER INTEGRITY............................................. 3.1-1 3.1.1 W21 Canister Helium Backfill Density................................... 3.1-1 3.1.2 Canister Vacuum Drying Pressure....................................... 3.1-2 3.1.3 Canister Leak Rate................................................... 3.1-3 3.1.4 Hydraulic Ram Force During Horizontal Canister Transfer................... 3.1-4 3.1.5 W21 Canister Vertical Time Limit in Transfer Cask......................... 3.1-5
3.2 CANISTER RADIATION PROTECTION................................ 3.2-1 3.2.1 Canister Surface Contamination........................................ 3.2-1
3.3 STORAGE CASK INTEGRITY........................................ 3.3-1 3.3.1 (Deleted).......................................................... 3.3-1 3.3.2 Storage Cask Periodic Monitoring....................................... 3.3-2 3.3.3 Storage Cask Temperatures During Horizontal Transfer..................... 3.3-6
3.4 TRANSFER CASK I NTEGRITY....................................... 3.4-1 3.4.1 Transfer Cask Structural Shell Temperature............................... 3.4-1
3.5 TRANSFER CASK RADIATION PROTECTION......................... 3.5-1 3.5.1 Transfer Cask Surface Contamination.................................... 3.5-1
4.0 DESIGN FEATURES................................................ 4.0-1 4.1 Storage System...................................................... 4.0-1 4.2 Storage Pad........................................................ 4.0-2 4.3 Site Specific Parameters and Analyses................................... 4.0-2
FuelSolutions' W21 Canister Renewed Amendment 4 TABLE OF CONTENTS Page
5.0 ADMINISTRATIVE CONTROLS...................................... 5.0-1 5.1 Training Modules.................................................... 5.0-1 5.2 Preoperational Testing and Training Exercises............................. 5.0-1 5.3 Programs.......................................................... 5.0-1 5.4 Special Requirements for First System in Place............................ 5.0-1
LIST OF TABLES
Table 2.1-1 FuelSolutions' W21 Loading Specification W21-1.................... 2.0-2 Table 2.1-2 FuelSolutions' W21 Loading Specification W21-2.................... 2.0-3 Table 2.1-3 Acceptable Fuel Assemblies and Parameters for Loading Specification W21-1................................... 2.0-4 Table 2.1-4 Acceptable Fuel Assemblies and Parameters for Loading Specification W21-2.................................. 2.0-11 Table 2.1-5 Fuel Cooling Table W21-1-A..................................... 2.0-19 Table 2.1-6 Fuel Cooling Table W21-1-B..................................... 2.0-20 Table 2.1-7 Fuel Cooling Table W21-2-A..................................... 2.0-21 Table 2.1-8 Fuel Cooling Table W21-2-B..................................... 2.0-22 Table 4.1-1 FuelSolutions' W21 Canister ASME Code Requirements Compliance Summary............................................ 4.0-3
FuelSolutions' W21 Canister Renewed Amendment 4 Definitions 1.1
1.0 USE AND APPLICATION 1.1 Definitions
NOTE The defined terms of this section appear in cap italized type and are applicable throughout these Technical Specifications and Bases.
Term Definition ACTIONS ACTIONS shall be that part of a Specification that prescribes Required Actions to be taken under designated Conditions within specified Completion Times.
CANISTER The CANISTER is the storage container for SFAs approved for use at the ISFSI.
INDEPENDENT SPENT FUEL The facility within the perimeter fence licensed for STORAGE INSTALLATION (ISFSI) storage of spent fuel within CANISTERs.
INTACT FUEL Fuel assemblies with no known or suspected cladding defects greater than hairline cracks or pinhole leaks.
LOADING OPERATIONS LOADING OPERATIONS include all licensed activities on a CANISTER while it is being loaded with fuel assemblies. LOADING OPERATIONS begin when the first fuel assembly is placed in the CANISTER and end when the CANISTER outer closure plate to shell weld examination is complete.
SPENT FUEL ASSEMBLIES (SFAs) Irradiated nuclear fuel assemblies that are to be placed in a CANISTER for dry storage.
SPENT FUEL STORAGE SYSTEM The storage components including the CANISTER, (SFSS) STORAGE CASK, and TRANSFER CASK.
STORAGE CASK The cask that provides a shielded, ventilated storage environment for the loaded CANISTER. This cask is used for TRANSFER OPERATIONS.
STORAGE OPERATIONS STORAGE OPERATIONS include all licensed activities that are performed at the ISFSI while a CANISTER containing spent fuel is sitting inside a STORAGE CASK on a storage pad within the ISFSI.
FuelSolutions' W21 Canister 1.1-1 Renewed Amendment 4 Definitions 1.1 1.1 Definitions
Term Definition TRANSFER CASK The cask that is used for SFA LOADING OPERATIONS and UNLOADING OPERATIONS, and for TRANSFER OPERATIONS.
TRANSFER OPERATIONS TRANSFER OPERATIONS include all licensed activities that are performed on a CANISTER loaded with one or more fuel assemblies when it is being moved to and from the ISFSI.
For movement to the ISFSI, TRANSFER OPERATIONS begin when the CANISTER outer closure plate to shell weld inspection is complete and end when the CANISTER is in the STORAGE CASK in its storage position on the storage pad within the ISFSI.
For movement from the ISFSI, TRANSFER OPERATIONS begin when the STORAGE CASK is moved and end when the CANISTER is moved into a transportation cask or the spent fuel building.
UNLOADING OPERATIONS UNLOADING OPERATIONS include all licensed activities on a CANISTER to be unloaded of the contained fuel assemblies. UNLOADING OPERATIONS begin when the CANISTER is ready to initiate removal of the CANISTER outer closure plate and end when the last fuel assembly is removed from the CANISTER.
FuelSolutions' W21 Canister 1.1-2 Renewed Amendment 4 Logical Connectors 1.2 1.0 USE AND APPLICATION
1.2 Logical Connectors
PURPOSE The purpose of this section is to explain the meaning of logical connectors.
Logical connectors are used in Technical Specifications (TS) to discriminate between, and yet connect, discrete Conditions, Required Actions, Completion Times, Surveillances, and Frequencies. The only logical connectors that appear in TS are AND and OR. The physical arrangement of these connectors constitutes logical conventions with specific meanings.
BACKGROUND Several levels of logic may be used to state Required Actions.
These levels are identified by the placement (or nesting) of the logical connectors and by the number assigned to each Required Action. The first level of logic is identified by the first digit of the num ber assigned to a Require Action and the placement of the logical connector in the first level of nesting (i.e., left justified with the number of the Required Action).
The successive levels of logic are identified by additional digits of the Required Action number and by successive indentations of the logical connectors.
When logical connectors are used to state a Condition, Completion Time, Surveillance, or Frequency, only the first level of logic is used, and the logical connector is left justified with the statement of the Condition, Completion Time, Surveillance, or Frequency.
EXAMPLES The following examples illustrate the use of logical c onnectors.
EXAMPLE 1.2-1 ACTIONS
COMPLETION CONDITION REQUIRED ACTION TIME A. LCO not met A.1 Verify...
AND A.2 Restore...
In this example the logical connector AND is used to indicate that when in Condition A, both Required Actions A.1 and A.2 must be completed.
FuelSolutions' W21 Canister 1.2-1 Renewed Amendment 4 Logical Connectors 1.2 1.2 Logical Connectors
EXAMPLES EXAMPLE 1.2-2 (continued) ACTIONS
COMPLETION CONDITION REQUIRED ACTION TIME A. LCO not met A.1 Stop...
OR A.2.1 Verify...
AND A.2.2.1 Reduce...
OR A.2.2.2 Perform...
OR A.3 Remove...
This example represents a more complicated use of logical connectors. Required Actions A.1, A.2, and A.3 are alternative choices, only one of which must be performed as indicated by the use of the logical connector OR and the left justified placement. Any one of these three Actions may be chosen. If A.2 is chosen, then both A.2.1 and A.2.2 must be performed as indicated by the logical connector AND. Required Action A.2.2 is met by performing A.2.2.1 or A.2.2.2. The indented position of the logical connector OR indicates that A.2.2.1 and A.2.2.2 are alternative choices, only one of which must be performed.
FuelSolutions' W21 Canister 1.2-2 Renewed Amendment 4 Completion Times 1.3 1.0 USE AND APPLICATION
1.3 Completion Times
PURPOSE The purpose of this section is to establish the Completion Time convention and to provide guidance for its use.
BACKGROUND Limiting Conditions for Operation (LCOs) specify the lowest functional capability or performance levels of equipment required for safe operation of the facility. The ACTIONS associated with an LCO state Conditions that typically describe the ways in which the requirements of the LCO can fail to be met. Specified with each stated Condition are Required Action(s) and Completion Time(s).
DESCRIPTION The Completion Time is the amount of time allowed for completing a Required Action. It is referenced to the time of discovery of a situation (e.g., equipment or variable not within limits) that requires entering an ACTIONS Condition unless otherwise specified, providing the facility is in a specified condition stated in the Applicability of the LCO. Required Actions must be completed prior to the expiration of the specified Completion Time. An ACTIONS Condition remains in effect and the Required Actions apply until the Condition no longer exists or the facility is not within the LCO Applicability.
Once a Condition has been entered, subsequent subsystems, components, or variables expressed in the Condition, discovered to be not within limits, will not result in separate entry into the Condition unless specifically stated. The Required Actions of the Condition continue to apply to each additional failure, with Completion Times based on initial entry into the Condition.
FuelSolutions' W21 Canister 1.3-1 Renewed Amendment 4 Completion Times 1.3 1.3 Completion Times
EXAMPLES The following examples illustrate the use of Completion Times with different types of Conditions and changing Conditions.
EXAMPLE 1.3-1 ACTIONS COMPLETION CONDITION REQUIRED ACTION TIME B. Required B.1 Perform Action 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Action and B.1.
associated AND Completion Time not B.2 Perform Action 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> met. B.2.
Condition B has two Required Actions. Each Required Action has its own separate Completion Time. Each Completion Time is referenced to the time that Condition B is entered.
The Required Actions of Condition B are to complete action B.1 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> AND complete action B.2 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
A total of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> is allowed for completing action B.1 and a total of 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> (not 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />) is allowed for completing action B.2 from the time that condition B was entered. If action B.1 is completed within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, the time allowed for completing action B.2 is the next 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> because the total time allowed for completing action B.2 is 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
FuelSolutions' W21 Canister 1.3-2 Renewed Amendment 4 Completion Times 1.3 1.3 Completion Times
EXAMPLES EXAMPLE 1.3-2 (continued) ACTIONS
COMPLETION CONDITION REQUIRED ACTION TIME A. One system A.1 Restore system 7 days not within to within limit.
limit.
B. Required B.1 Perform Action 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Action and B.1.
associated AND Completion Time not B.2 Perform Action 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> met. B.2.
When it is determined that a system does not meet the LCO, Condition A is entered. If the syst em is not restored within 7 days, Condition B is also entered and the Completion Time clocks for Required Actions B.1 and B.2 start. If the system is restored after Condition B is entered, Condition A and B are exited, and therefore, the Required Actions of Condition B may be terminated.
FuelSolutions' W21 Canister 1.3-3 Renewed Amendment 4 Completion Times 1.3 1.3 Completion Times
EXAMPLES EXAMPLE 1.3-3 (continued) ACTIONS
NOTE Separate Condition entry is allowed for each component.
COMPLETION CONDITION REQUIRED ACTION TIME A. LCO not A.1 Restore 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> met. compliance with LCO.
B. Required B.1 Perform Action 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Action and B.1.
associated AND Completion Time not B.2 Perform Action 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> met. B.2.
The Note above the ACTIONS Table is a method of modifying the Completion Time tracking. If this method of modifying the Completion Time tracking were only applicable to a specific Condition, the Note would appear in that Condition rather than at the top of the ACTIONS Table.
The Note allows Condition A to be entered separately for each component, and Completion Times tracked on a per component basis. When a component does not meet the LCO, Condition A is entered and its Completion Time starts. If it is determined that subsequent components do not meet the LCO, Condition A is entered for each component and separate Completion Times start and are tracked for each component.
IMMEDIATE When Immediately is used as a Completion Time, the COMPLETION TIME Required Action should be pursued without delay and in a controlled manner.
FuelSolutions' W21 Canister 1.3-4 Renewed Amendment 4 Frequency 1.4 1.0 USE AND APPLICATION
1.4 Frequency
PURPOSE The purpose of this section is to define the proper use and application of Frequency requirements.
DESCRIPTION Each Surveillance Requirement (SR) has a specified Frequency in which the surveillance must be met in order to meet the associated Limiting Condition for Operation (LCO). An understanding of the correct application of the specified Frequency is necessary for compliance with the SR.
The specified Frequency is referred to throughout this section and each of the Specifications of Section 3.0, Surveillance Requirement (SR) Applicability. The specified Frequency consists of the requirements of the Frequency column of each SR, as well as certain Notes in the Surveillance column that modify performance requirements.
Situations where a Surveillance could be required (i.e., its Frequency could expire), but where it is not possible or not desired that it be performed until sometime after the associated LCO is within its Applicability, represent potential SR 3.0.4 conflicts. To avoid these conflicts, the SR (i.e., the Surveillance or the Frequency) is stated such that it is only required when it can be and should be performed. With an SR satisfied, SR 3.0.4 imposes no restriction.
The use of met or performed in these instances conveys specific meaning. A Surveillance is met only when the acceptance criteria are satisfied. Known failure of the requirements of a Surveillance, even without a Surveillance specifically being performed, constitutes a Surveillance not met.
FuelSolutions' W21 Canister 1.4-1 Renewed Amendment 4 Frequency 1.4 1.4 Frequency
EXAMPLES The following examples illustrate the various ways that Frequencies are specified:
EXAMPLE 1.4-1 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY Verify pressure within limit. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Example 1.4-1 contains the type of SR most often encountered in the Technical Specifications (TS). The Frequency specifies an interval (12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />) during which the associated Surveillance must be performed at least one time. Performance of the Surveillance initiates the subsequent interval. Although the Frequency is stated as 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, an extension of the time interval to 1.25 times the interval specified in the Frequency is allowed by SR 3.0.2 for operational flexibility. The measurement of this interval continues at all times, even when the SR is not required to be met per SR 3.0.1 (such as when it is determined the equipment does not meet the LCO, a variable is outside specified limits, or the unit is outside the Applicability of the LCO). If the interval specified by SR 3.0.2 is exceeded while the cask is in a condition sp ecified in the Applicability of the LCO, the LCO is not met in accordance with SR 3.0.1.
If the interval as specified by SR 3.0.2 is exceeded while the unit is not in a condition specified in the Applicability of the LCO for which performance of the SR is required, the Surveillance must be performed within the Frequency requirements of SR 3.0.2 prior to entry into the specified condition. Failure to do so would result in a violation of SR 3.0.4.
FuelSolutions' W21 Canister 1.4-2 Renewed Amendment 4 Frequency 1.4 1.4 Frequency
EXAMPLES EXAMPLE 1.4-2 (continued) SURVEILLANCE REQUIREMENTS
SURVEILLANCE FREQUENCY Verify flow is within limits. Once within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> prior to starting activity AND 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter Example 1.4-2 has two Frequencies. The first is a one-time performance Frequency, and the second is of the type shown in Example 1.4-1. The logical connector AND indicates that both Frequency requirements must be met. Each time the example activity is to be performed, the Surveillance must be performed prior to starting the activity.
The use of once indicates a single performance will satisfy the specified Frequency (assumi ng no other Frequencies are connected by AND). This type of Frequency does not qualify for the 25% extension allowed by SR 3.0.2.
Thereafter indicates future performances must be established per SR 3.0.2, but only after a specified condition is first met (i.e., the once performance in this example). If the specified activity is canceled or not pe rformed, the measurement of both intervals stops. New intervals start upon preparing to restart the specified activity.
FuelSolutions' W21 Canister 1.4-3 Renewed Amendment 4 Functional and Operating Limits 2.0
2.0 FUNCTIONAL AND OPERATING LIMITS
2.1 Functional and Operating Limits 2.1.1 Fuel to be Stored in the FuelSolutions' W21 Canister SFAs meeting the limits specified in Tables 2.1-1 and 2.1-2 may be stored in a W21 CANISTER.
2.2 Functional and Operating Limits Violations If any Functional and Operating Limits are violated, the following actions shall be completed.
These actions are not a substitute for the reporting requirements contained in 10CFR72.75.
2.2.1 The affected fuel assemblies shall be placed in a safe condition without delay and in a controlled manner.
2.2.2 The NRC Operations Center shall be notified within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
2.2.3 A special report will be provide d to NRC within 30 days that describes the cause of the violation, the actions to restore compliance, and the actions to prevent recurrence.
FuelSolutions' W21 Canister 2.0-1 Renewed Amendment 4 Functional and Operating Limits 2.0 2.0 Functional and Operating Limits
Table 2.1-1 FuelSolutions' W21 Loading Specification W21-1
W21-1 Payload Configuration Full Loading of 21 Intact Fuel Assemblies Parameter Limit/Specification
Payload
Description:
< 21 PWR fuel assemblies or PWR fuel assemblies with control components, as defined in Table 2.1-3. If less than 21 fuel assemblies are loaded, a dummy fuel assembly shall be placed into each empty CANISTER basket guide tube. Each dummy fuel assembly shall be the approximate weight and size of the actual fuel being loaded.
Maximum Weight per < 1,680 pounds Assembly:
Heat Load Limit per 1.05 kW Assembly:
Cladding Material/Condition: Intact zircaloy-clad fuel assemblies with no known or suspected cladding defects greater than hairline cracks or pinhole leaks.
Partial fuel assemblies, i.e., fuel assemblies from which fuel rods are missing, must not be loaded into the CANISTER unless dummy fuel rods are inserted into the assembly in the locations of the missing rods. The dummy fuel rods shall displace an amount of water equal to that displaced by the original fuel rods.
Initial Enrichment: The maximum acceptable enrichment varies by fuel assembly class and type and shall not exceed the enrichments defined in Table 2.1-3.
Burnup: < 60,000 MWd/MTU.(1, 2)
Cooling Time: The minimum acceptable cooling time varies by fuel assembly class and enrichment, as a function of burnup; and is also dependent on the total cobalt content of the fuel and control components. The effects of the maximum acceptable decay heat, initial uranium content, and gamma and neutron sources are incorporated into the minimum cooling time determination. Fuel assemblies shall not be stored with less than the minimum acceptable cooling time indicated in Tables 2.1-5 and 2.1-6.
Notes:
(1) The exposure (burnup) of any inserted control component must not exceed that of the host assembly.
(2) For burnups exceeding 45,000 MWd/MTU, cladding oxide layer thickness is limited to 70 µm, to be determined in accordance with TS 5.3.7.
FuelSolutions' W21 Canister 2.0-2 Renewed Amendment 4 Functional and Operating Limits 2.0 2.0 Functional and Operating Limits
Table 2.1-2 FuelSolutions' W21 Loading Specification W21-2
W21-2 Payload Configuration Partial Loading of 20 Intact Fuel Assemblies Parameter Limit/Specification
Payload
Description:
< 20 PWR fuel assemblies or PWR fuel assemblies with control components, as defined in Table 2.1-4. The center storage location shall not contain a fuel assembly. If less than 20 fuel assemblies are loaded, a dummy fuel assembly shall be placed into each empty CANISTER basket guide tube (except for the center guide tube).
Each dummy fuel assembly shall be the approximate weight and size of the actual fuel being loaded.
Maximum Weight per < 1,680 pounds Assembly Heat Load Limit per 1.05 kW Assembly:
Cladding Material/Condition: Intact zircaloy-clad fuel assemblies with no known or suspected cladding defects greater than hairline cracks or pinhole leaks.
Partial fuel assemblies, i.e., fuel assemblies from which fuel rods are missing, must not be loaded into the CANISTER unless dummy fuel rods are inserted into the assembly in the locations of the missing rods. The dummy fuel rods shall displace an amount of water equal to that displaced by the original fuel rods.
Initial Enrichment: The maximum acceptable enrichment shall not exceed the enrichments defined in Table 2.1-4.
Burnup: < 60,000 MWd/MTU.(1, 2)
Cooling Time: The minimum acceptable cooling time varies by fuel assembly class and enrichment, as a function of burnup; and is also dependent on the total cobalt content of the fuel and control components. The effects of the maximum acceptable decay heat, initial uranium content, and gamma and neutron sources are incorporated into the minimum cooling time determination. Fuel assemblies shall not be stored with less than the minimum acceptable c ooling time indicated in Tables 2.1-7 and 2.1-8.
Notes:
(1) The exposure (burnup) of any inserted control component must not exceed that of the host assembly.
(2) For burnups exceeding 45,000 MWd/MTU, cladding oxide layer thickness is limited to 70 µm, to be determined in accordance with TS 5.3.7.
FuelSolutions' W21 Canister 2.0-3 Renewed Amendment 4
Functional and Operating Limits 2.0 2.0 Functional and Operating Limits
Table 2.1-5 Fuel Cooling Table W21-1-A
APPLICABILITY:
Canister: FuelSolutions' W21-M and W21-T Canisters Loading Specification: W21-1 (Table 2.1-1)
Description:
Up to 21 fuel assemblies SNF Assemblies: Valid for the SNF assemblies listed in Table 2.1-3 Cobalt Range: 11 g in active fuel region (low-cobalt)
QUALIFICATION BASES:
Storage Cask Dose Rate 50 mrem/hr Canister Heat Load 22.0 kW/Canister, and # 0.161 kW/inch-Canister Maximum Required Minimum Cooling Time (yr.)(1,2)
Burnup Minimum Initial Enrichment (w/o 235U)
(MWD/MTU)(1,3) 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
15,000 3.3 3.3 3.2 3.2 3.2 3.1 3.1 3.1 20,000 3.7 3.6 3.5 3.5 3.4 3.4 3.4 3.4
25,000 4.0 3.9 3.8 3.7 3.7 3.6 3.6 3.6 30,000 4.9 4.6 4.4 4.2 4.1 4.0 3.9 3.8
32,000 5.2 5.0 4.8 4.6 4.4 4.2 4.1 4.0 34,000 5.5 5.3 5.0 4.8 4.6 4.5 4.3 4.2
36,000 5.9 5.6 5.4 5.1 5.0 4.8 4.6 4.5
38,000 6.4 5.9 5.7 5.5 5.3 5.1 4.9 4.8 40,000 7.1 6.5 6.0 5.7 5.5 5.4 5.2 5.0
42,000 8.0 7.4 6.9 6.4 6.0 5.8 5.6 5.5 44,000 9.1 8.1 7.5 7.0 6.6 6.2 5.9 5.8
46,000 NQ (4) 9.3 8.3 7.7 7.3 6.9 6.5 6.2 48,000 NQ 10.6 9.5 8.6 7.9 7.5 7.2 6.8
50,000 NQ NQ 10.7 9.7 8.9 8.2 7.7 7.4 52,000 NQ NQ 12.3 11.0 9.9 9.2 8.6 8.0
54,000 NQ NQ NQ 12.7 11.4 10.4 9.6 9.0 56,000 NQ NQ NQ 14.5 13.1 11.8 10.8 10.0
58,000 NQ NQ NQ NQ 14.8 13.5 12.2 11.3
60,000 NQ NQ NQ NQ 16.9 15.3 13.9 12.8
FuelSolutions' W21 Canister 2.0-19 Renewed Amendment 4 Functional and Operating Limits 2.0 2.0 Functional and Operating Limits
Table 2.1-6 Fuel Cooling Table W21-1-B
APPLICABILITY:
Canister: FuelSolutions' W21-M and W21-T Canisters Loading Specification: W21-1 (Table 2.1-1)
Description:
Up to 21 fuel assemblies SNF Assemblies: Valid for the SNF assemblies listed in Table 2.1-3 Cobalt Range: 50 g in active fuel region (high-cobalt)
QUALIFICATION BASES:
Storage Cask Dose Rate 50 mrem/hr Canister Heat Load 22.0 kW/Canister, and # 0.161 kW/inch-Canister Maximum Required Minimum Cooling Time (yr.)(1,2)
Burnup Minimum Initial Enrichment (w/o 235U)
(MWD/MTU)(1,3) 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
15,000 4.2 4.0 3.9 3.8 3.8 3.8 3.7 3.7 20,000 4.9 4.6 4.5 4.4 4.3 4.2 4.2 4.1
25,000 5.6 5.3 5.1 5.0 4.9 4.8 4.7 4.7
30,000 6.2 6.0 5.5 5.4 5.3 5.2 5.1 5.0 32,000 6.6 6.4 5.7 5.6 5.5 5.4 5.3 5.2
34,000 7.0 6.8 6.0 5.8 5.7 5.6 5.5 5.4 36,000 7.2 7.0 6.2 6.1 5.9 5.8 5.7 5.6
38,000 7.6 7.4 6.6 6.4 6.2 6.0 5.9 5.8 40,000 7.7 7.6 7.4 6.4 6.2 6.0 5.9 5.8
42,000 8.2 8.0 7.9 6.8 6.6 6.5 6.3 6.1 44,000 9.1 8.4 8.2 7.1 6.9 6.8 6.6 6.4
46,000 NQ (4) 9.3 8.3 7.7 7.3 6.9 6.7 6.5 48,000 NQ 10.6 9.5 8.6 7.9 7.5 7.2 6.8
50,000 NQ NQ 10.7 9.7 8.9 8.2 7.7 7.4
52,000 NQ NQ 12.3 11.0 9.9 9.2 8.6 8.0 54,000 NQ NQ NQ 12.7 11.4 10.4 9.6 9.0
56,000 NQ NQ NQ 14.5 13.1 11.8 10.8 10.0 58,000 NQ NQ NQ NQ 14.8 13.5 12.2 11.3
60,000 NQ NQ NQ NQ 16.9 15.3 13.9 12.8
FuelSolutions' W21 Canister 2.0-20 Renewed Amendment 4 Functional and Operating Limits 2.0 2.0 Functional and Operating Limits
Table 2.1-7 Fuel Cooling Table W21-2-A
APPLICABILITY:
Canister: FuelSolutions' W21-M and W21-T Canisters Loading Specification: W21-2 (Table 2.1-2)
Description:
Up to 20 fuel assemblies SNF Assemblies: Valid for the SNF assemblies listed in Table 2.1-4 Cobalt Range: 11 g in active fuel region (low-cobalt)
QUALIFICATION BASES:
Storage Cask Dose Rate 50 mrem/hr Canister Heat Load 22.0 kW/Canister, and # 0.161 kW/inch-Canister Maximum Required Minimum Cooling Time (yr.)(1,2)
Burnup Minimum Initial Enrichment (w/o 235U)
(MWD/MTU)(1,3 ) 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
15,000 3.3 3.3 3.2 3.2 3.2 3.1 3.1 3.1 20,000 3.7 3.6 3.5 3.5 3.4 3.4 3.4 3.4
25,000 4.0 3.9 3.8 3.7 3.7 3.6 3.6 3.6 30,000 4.9 4.6 4.4 4.2 4.1 4.0 3.9 3.8
32,000 5.2 5.0 4.8 4.6 4.4 4.2 4.1 4.0 34,000 5.5 5.3 5.0 4.8 4.6 4.5 4.3 4.2
36,000 5.9 5.6 5.4 5.1 5.0 4.8 4.6 4.5 38,000 6.4 5.9 5.7 5.5 5.3 5.1 4.9 4.8
40,000 7.1 6.5 6.0 5.7 5.5 5.4 5.2 5.0
42,000 8.0 7.4 6.9 6.4 6.0 5.8 5.6 5.5 44,000 9.1 8.1 7.5 7.0 6.6 6.2 5.9 5.8
46,000 NQ (4) 9.3 8.3 7.7 7.3 6.9 6.5 6.2 48,000 NQ 10.6 9.5 8.6 7.9 7.5 7.2 6.8
50,000 NQ NQ 10.7 9.7 8.9 8.2 7.7 7.4 52,000 NQ NQ 12.3 11.0 9.9 9.2 8.6 8.0
54,000 NQ NQ NQ 12.7 11.4 10.4 9.6 9.0 56,000 NQ NQ NQ 14.5 13.1 11.8 10.8 10.0
58,000 NQ NQ NQ NQ 14.8 13.5 12.2 11.3 60,000 NQ NQ NQ NQ 16.9 15.3 13.9 12.8
FuelSolutions' W21 Canister 2.0-21 Renewed Amendment 4 Functional and Operating Limits 2.0 2.0 Functional and Operating Limits
Table 2.1-8 Fuel Cooling Table W21-2-B
APPLICABILITY:
Canister: FuelSolutions' W21-M and W21-T Canisters Loading Specification: W21-2 (Table 2.1-2)
Description:
Up to 20 fuel assemblies SNF Assemblies: Valid for the SNF assemblies listed in Table 2.1-4 Cobalt Range: 50 g in active fuel region (high-cobalt)
QUALIFICATION BASES:
Storage Cask Dose Rate 50 mrem/hr Canister Heat Load 22.0 kW/Canister, and # 0.161 kW/inch-Canister Maximum Required Minimum Cooling Time (yr.)(1,2)
Burnup Minimum Initial Enrichment (w/o 235U)
(MWD/MTU)(1,3 ) 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
15,000 4.2 4.0 3.9 3.8 3.8 3.8 3.7 3.7 20,000 4.9 4.6 4.5 4.4 4.3 4.2 4.2 4.1
25,000 5.6 5.3 5.1 5.0 4.9 4.8 4.7 4.7 30,000 6.2 6.0 5.5 5.4 5.3 5.2 5.1 5.0
32,000 6.6 6.4 5.7 5.6 5.5 5.4 5.3 5.2 34,000 7.0 6.8 6.0 5.8 5.7 5.6 5.5 5.4
36,000 7.2 7.0 6.2 6.1 5.9 5.8 5.7 5.6 38,000 7.6 7.4 6.6 6.4 6.2 6.0 5.9 5.8
40,000 7.7 7.6 7.4 6.4 6.2 6.0 5.9 5.8
42,000 8.2 8.0 7.9 6.8 6.6 6.5 6.3 6.1 44,000 9.1 8.4 8.2 7.1 6.9 6.8 6.6 6.4
46,000 NQ (4) 9.3 8.3 7.7 7.3 6.9 6.7 6.5 48,000 NQ 10.6 9.5 8.6 7.9 7.5 7.2 6.8
50,000 NQ NQ 10.7 9.7 8.9 8.2 7.7 7.4 52,000 NQ NQ 12.3 11.0 9.9 9.2 8.6 8.0
54,000 NQ NQ NQ 12.7 11.4 10.4 9.6 9.0 56,000 NQ NQ NQ 14.5 13.1 11.8 10.8 10.0
58,000 NQ NQ NQ NQ 14.8 13.5 12.2 11.3 60,000 NQ NQ NQ NQ 16.9 15.3 13.9 12.8
FuelSolutions' W21 Canister 2.0-22 Renewed Amendment 4 Functional and Operating Limits 2.0 2.0 Functional and Operating Limits
Table 2.1-5 through Table 2.1-8 Notes:
(1) Rounding: round up to next highest burnup, round down to next lowest enrichment. Alternatively, more precise cooling times may be obtained by linear interpolation of the cooling time between listed burnup level, enrichment levels, or both.
(2) Enrichments less than 1.5% or greater than the criticality limit presented in Section 6.1 of the FuelSolutions' W21 Canister Storage FSAR are not qualified.
(3) Burnups greater than 60,000 MWD/MTU are not qualified for storage. Fuel less than 15,000 MWD/MTU is acceptable at or beyond the minimum cooling time indicated for 15,000 MWD/MTU.
(4) Not qualified for storage.
FuelSolutions' W21 Canister 2.0-23 Renewed Amendment 4 LCO Applicability 3.0 3.0 LIMITING CONDITION FOR OPERATION (LCO) APPLICABILITY
LCO 3.0.1 LCOs shall be met during specified conditions in the Applicability, except as provided in LCO 3.0.2.
LCO 3.0.2 Upon discovery of a failure to meet an LCO, the Required Actions of the associated Conditions shall be met, except as provided in LCO 3.0.5.
If the LCO is met or is no longer applicable prior to expiration of the specified Completion Time(s), completion of the Re quired Action(s) is not required, unless otherwise stated.
LCO 3.0.3 Not applicable to an SFSS.
LCO 3.0.4 When an LCO is not met, entry into a specified condition in the Applicability shall not be made except when the associated ACTIONS to be entered permit continued operation in the specified condition in the Applicability for an unlimited period of time. This Specifi cation shall not prevent changes in specified conditions in the Applicability that are required to comply with ACTIONS or that are related to the unloading of a CANISTER.
LCO 3.0.5 Equipment removed from service or not in service in compliance with ACTIONS may be returned to service under administrative control solely to perform testing required to demonstrate it meets the LCO or that other equipment meets the LCO.
This is an exception to LCO 3.0.2 for the system returned to service under administrative control to perform the testing.
LCO 3.0.6 Not applicable to an SFSS.
LCO 3.0.7 Not applicable to an SFSS.
FuelSolutions' W21 Canister 3.0-1 Renewed Amendment 4 LCO Applicability 3.0 3.0 SURVEILLANCE REQUIREMENT (SR) APPLICABILITY
SR 3.0.1 SRs shall be met during the specified conditions in the Applicability for individual LCOs, unless otherwise stated in the SR. Failure to meet a Surveillance, whether such failure is experienced during the performance of the Surveillance or between performances of the Surveillance, shall be failure to meet the LCO. Failure to perform a Surveillan ce within the specified Frequency shall be failure to meet the LCO except as provided in SR 3.0.3. Surveillances do not have to be performed on equipment or variables outside specified limits.
SR 3.0.2 The specified Frequency for each SR is met if the Surveillance is performed within 1.25 times the interval specified in the Frequency, as measured from the previous performance or a measured from the time a specified condition of the Frequency is met.
For Frequencies specified as once, the above interval extension does not apply.
If a Completion Time requires periodic performance on a once per basis, the above Frequency extension applies to each performance after the initial performance.
Exceptions to this Specification are stated in the individual Specifications.
SR 3.0.3 If it is discovered that a Surveillance was not performed within its specified Frequency, then compliance with the requirement to declare the LCO not met may be delayed, from the time of discovery, up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or up to the limit of the specified Frequency, whichever is less. This delay period is permitted to allow performance of the Surveillance.
If the Surveillance is not performed within the delay period, the LCO must immediately be declared not met, and the applicable Condition(s) must be entered.
When the Surveillance is performed within the delay period and the Surveillance is not met, the LCO must immediately be declared not met, and the applicable Condition(s) must be entered.
SR 3.0.4 Entry into a specified condition in th e Applicability of an LCO shall not be made unless the LCOs Surveillances have been met within their specified Frequency.
This provision shall not prevent entry into specified conditions in the Applicability that are required to comply with ACTIONS or that are related to the unloading of a CANISTER.
FuelSolutions' W21 Canister 3.0-2 Renewed Amendment 4 W21 Canister Helium Backfill Density 3.1.1 3.1 CANISTER INTEGRITY 3.1.1 W21 Canister Helium Backfill Density
LCO 3.1.1 The CANISTER helium backfill density shall be in the range of 0.0368 g-moles/liter to 0.0395 g-moles/liter (i.e. in the range of 0.0378 +/- 0.0010 g-moles/liter to 0.0385 +/- 0.0010 g-moles/liter).
APPLICABILITY: During LOADING OPERATIONS.
ACTIONS
NOTE Separate Condition entry is allowed for each CANISTER.
COMPLETION CONDITION REQUIRED ACTION TIME A. CANISTER helium A.1 Establish CANISTER 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> backfill quantity limit is helium backfill quantity not met. within limit.
B. Required Action and B.1 Remove all fuel assemblies 30 days associated Completion from CANISTER.
Time are not met.
SURVEILLANCE REQUIREMENTS
NOTE The helium used for backfill shall have a minimum purity of 99.995%.
SURVEILLANCE FREQUENCY
SR 3.1.1.1 Verify CANISTER helium backfill quantity is Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after within limit. verifying CANISTER cavity vacuum drying pressure is within limit.
FuelSolutions' W21 Canister 3.1-1 Renewed Amendment 4 Canister Vacuum Drying Pressure 3.1.2 3.1 CANISTER INTEGRITY 3.1.2 Canister Vacuum Drying Pressure
See the Storage System Technical Specification for the applicable LCO.
FuelSolutions' W21 Canister 3.1-2 Renewed Amendment 4 Canister Leak Rate 3.1.3 3.1 CANISTER INTEGRITY 3.1.3 Canister Leak Rate
See the Storage System Technical Specification for the applicable LCO.
FuelSolutions' W21 Canister 3.1-3 Renewed Amendment 4 Hydraulic Ram Force During Horizontal Canister Transfer 3.1.4 3.1 CANISTER INTEGRITY 3.1.4 Hydraulic Ram Force During Horizontal Canister Transfer
See the Storage System Technical Specification for the applicable LCO.
FuelSolutions' W21 Canister 3.1-4 Renewed Amendment 4 W21 Canister Vertical Time Limit in Transfer Cask 3.1.5 3.1 CANISTER INTEGRITY 3.1.5 W21 Canister Vertical Time Limit in Transfer Cask
LCO 3.1.5 For vertical TRANSFER OPERATIONS, the CANISTER transfer out of the TRANSFER CASK shall be completed within 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> after draining the annulus water from the TRANSFER CASK. For horizontal TRANSFER OPERATIONS, the movement of the TRANSFER CASK to the horizontal position on the transfer trailer shall be completed within 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> after draining the annulus water from the TRANSFER CASK.
APPLICABILITY: During TRANSFER OPERATIONS.
ACTIONS
NOTE Separate Condition entry is allowed for each CANISTER.
COMPLETION CONDITION REQUIRED ACTION TIME A. CANISTER time limit in A.1 Fill annulus with water. 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
drained annulus TRANSFER CASK is not met. AND A.2 Maintain filled annulus. 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
SURVEILLANCE REQUIREMENTS
SURVEILLANCE FREQUENCY
SR 3.1.5.1 Verify TRANSFER CASK operations with Within 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> after CANISTER in vertical orientation and annulus completion of drained are completed within time limit. TRANSFER CASK/
CANISTER annulus draining.
FuelSolutions' W21 Canister 3.1-5 Renewed Amendment 4 Canister Surface Contamination 3.2.1 3.2 CANISTER RADIATION PROTECTION 3.2.1 Canister Surface Contamination
See the Storage System Technical Specification for the applicable LCO.
FuelSolutions' W21 Canister 3.2-1 Renewed Amendment 4 (Deleted) l 3.3.1 3.3 STORAGE CASK INTEGRITY
3.3.1 (Deleted) l
FuelSolutions' W21 Canister 3.3-1 Renewed Amendment 4 Storage Cask Periodic Monitoring l 3.3.2
3.3 STORAGE CASK INTEGRITY 3.3.2 Storage Cask Periodic Monitoring
LCO 3.3.2 The inlet and outlet vent screens of a STORAGE CASK with a W21 CANISTER containing fuel assemblies shall be visibly free of blockage or damage.
OR The temperature of a STORAGE CASK with a W21 CANISTER containing fuel assemblies, as indicated by the liner thermocouple, shall meet the temperature limit established by the storage cask periodic monitoring program.
APPLICABILITY: During STORAGE OPERATIONS.
ACTIONS NOTE Separate Condition entry is allowed for each STORAGE CASK.
COMPLETION CONDITION REQUIRED ACTION TIME A. LCO 3.3.2 not met. A.1 If vent blockage is identified 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> during visual inspection of vent screens, clear vent screens of blockage.
AND A.2.1 If vent damage is identified 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> during visual inspection of vent screens, remove the damaged vent screen(s).
AND A.2.2.1 If vent damage 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> significantly reduces flow area but does not increase access to vent channels, repair or replace the damaged vent screen(s).
OR (continued)
FuelSolutions' W21 Canister 3.3-2 Renewed Amendment 4 Storage Cask Periodic Monitoring 3.3.2 3.3.2 Storage Cask Periodic Monitoring
COMPLETION CONDITION REQUIRED ACTION TIME A.2.2.2 If vent damage increases 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> access to vent channel, perform a visual inspection of the vent channel, clear any debris or obstructions found, and repair or replace the damaged vent screen(s).
AND A.2.3 Attach the repaired or 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> replacement vent screen(s) to the STORAGE CASK.
OR A.3.1 If the liner thermocouple 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> temperature exceeds the allowable temperature limit, check the STORAGE CASK inlet and outlet vent screens for blockage or damage.
AND A.3.2.1 If vents are blocked or In accordance with damaged, perform ACTIONS A.1 and ACTIONS A.1 and A.2, as A.2.
required.
OR A.3.2.2.1 If vents are not blocked or 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> damaged, check the liner thermocouple and related instrumentation to assure it is functioning properly.
AND A.3.2.2.2 Repair or replace 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> thermocouple and related instrumentation as necessary.
AND (continued)
A.3.3 Verify STORAGE CASK 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />
FuelSolutions' W21 Canister 3.3-3 Renewed Amendment 4 Storage Cask Periodic Monitoring 3.3.2 3.3.2 Storage Cask Periodic Monitoring
COMPLETION CONDITION REQUIRED ACTION TIME temperature returns to within the the local concrete long-term temperature limit of 200°F.
AND A.3.4 Verify STORAGE CASK 192 hours0.00222 days <br />0.0533 hours <br />3.174603e-4 weeks <br />7.3056e-5 months <br /> temperature returns to within the applicable temperature limit from the storage cask periodic monitoring program.
B. Required Actions and B.1 Initiate actions to cool the 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> associated Completion cask to within the limit.
Times are not met. AND B.2.1 Visually inspect the interior 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> of the STORAGE CASK for ventilation obstructions using remote inspection tools or by temporarily removing the STORAGE CASK topcover.
AND B.2.2.1 Remove ventilation 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> obstructions.
AND B.2.2.2 Verify STORAGE CASK 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> temperature returns to within local concrete long-term temperature limit of 200°F.
AND B.2.2.3 Verify STORAGE CASK 270 days temperature returns to within the applicable limit from the storage cask periodic monitoring program.
OR (continued)
FuelSolutions' W21 Canister 3.3-4 Renewed Amendment 4 Storage Cask Periodic Monitoring 3.3.2 3.3.2 Storage Cask Periodic Monitoring
COMPLETION CONDITION REQUIRED ACTION TIME B.2.3.1 Return CANISTER to 30 days TRANSFER CASK.
AND B.3.3.2 Return CANISTER to 270 days repaired or replacement STORAGE CASK.
SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.3.2.1 Visually inspect all four inlet screens and all four Based on storage outlet screens for each loaded STORAGE CASK. cask periodic OR monitoring program.
Verify that the STORAGE CASK temperatures are within limit NOTE
STORAGE CASK temperatures are expected to vary slightly between successive measurements due to changes in the ambient temperature. This is acceptable as long as the temperatures remain within the specified limit.
FuelSolutions' W21 Canister 3.3-5 Renewed Amendment 4 Storage Cask Temperatures During Horizontal Transfer 3.3.3
3.3 STORAGE CASK INTEGRITY 3.3.3 Storage Cask Temperatures During Horizontal Transfer
LCO 3.3.3 The measured temperature of a STORAGE CASK with a W21 CANISTER containing fuel assemblies, as indicated by the liner thermocouple, shall not exceed 190°F (88°C).
APPLICABILITY: During TRANSFER OPERATIONS.
ACTIONS NOTE Separate Condition entry is allowed for each STORAGE CASK.
COMPLETION CONDITION REQUIRED ACTION TIME A. STORAGE CASK A.1 Transfer the CANISTER 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> concrete temperature limit into the TRANSFER CASK is not met.
B. Required Action A.1 and B.1 Inspect the STORAGE 5 days associated Completion CASK for damage.
Times are not met. AND
B.2.1 If no damage, transfer 7 days CANISTER to STORAGE CASK.
OR B.2.2 If damaged, transfer 21 days CANISTER to new STORAGE CASK.
C. Required Actions B.1 and C.1 Return CANISTER to 30 days B.2-1, or B.1 and B.2.2, TRANSFER CASK.
and associated Completion AND Time are not met. C.2 Return CANISTER to 270 days repaired or replacement STORAGE CASK.
FuelSolutions' W21 Canister 3.3-6 Renewed Amendment 4 Storage Cask Temperatures During Horizontal Transfer 3.3.3
SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.3.3.1 After the STORAGE CASK is downended to 30 minutes the horizontal orientation with a CANISTER loaded with SNF inside, monitor and record STORAGE CASK concrete temperature as indicated by the STORAGE CASK liner thermocouple.
FuelSolutions' W21 Canister 3.3-7 Renewed Amendment 4 Transfer Cask Structural Shell Temperature 3.4.1
3.4 TRANSFER CASK INTEGRITY 3.4.1 Transfer Cask Structural Shell Temperature
See the Storage System Technical Specification for the applicable LCO.
FuelSolutions' W21 Canister 3.4-1 Renewed Amendment 4 Transfer Cask Surface Contamination 3.5.1 3.5 TRANSFER CASK RADIATION PROTECTION 3.5.1 Transfer Cask Surface Contamination
See the Storage System Technical Specification for the applicable LCO.
FuelSolutions' W21 Canister 3.5-1 Renewed Amendment 4 Design Features 4.0 4.0 DESIGN FEATURES
The specifications in this section include the de sign characteristics of special importance to each of the physical barriers and the maintenance of safety margins in the storage system component design. The principal objective of this category is to describe the design envelope which might constrain any physical changes to essential equipment. Included in this category are the site environmental parameters which provide the base s for design, but are not inherently suited for description as LCOs.
4.1 Storage System 4.1.1 Storage Cask 4.1.1.1 Structural Performance See the Storage System Technical Specification Section 4.1.1.1 for discussion of STORAGE CASK structural performance features.
4.1.1.2 Codes and Standards See the Storage System Technical Specification Section 4.1.1.2 for discussion of codes and standards applicable to the STORAGE CASK.
4.1.1.3 Fabrication Exceptions to Codes, Standards, and Criteria See the Storage System Technical Specification Section 4.1.1.3 for discussion of exceptions to codes, standards, and criteria.
4.1.2 Transfer Cask 4.1.2.1 Structural Performance See the Storage System Technical Specification Section 4.1.2.1 for discussion of TRANSFER CASK structural performance features.
4.1.2.2 Codes and Standards See the Storage System Technical Specification Section 4.1.2.2 for discussion of codes and standards applicable to the TRANSFER CASK.
4.1.2.3 Fabrication Exceptions to Codes, Standards, and Criteria See the Storage System Technical Specification Section 4.1.2.3 for discussion of exceptions to codes, standards, and criteria.
4.1.3 Canister 4.1.3.1 Criticality The design of the W21 CANISTER, including spatial constraints on adjacent assemblies (minimum basket cell opening of 8.90 inches square) and the boron content of the basket neutron absorber material (minimum areal density equal to 20 mg 10B/cm2) shall assure that fuel assemblies are maintained in a subcritical condition with a keff less than 0.95 under all conditions of operation.
FuelSolutions' W21 Canister 4.0-1 Renewed Amendment 4 Design Features 4.0 4.0 Design Features
4.1.3.2 Structural Performance The CANISTER has been evaluated for a side drop resulting in a lateral gravitational (g) loading of 60 g and an end drop resulting in an axial gravitational loading of 50 g.
The maximum weight of a loaded, dried, and sealed W21 CANISTER is 85,000 pounds. The maximum CANISTER weight includes fuel assembly spacers, where applicable.
The W21 CANISTER thermal rating of 25.1 kW is determined by the minimum heat load qualification in th e STORAGE and TRANSFER CASKS.
4.1.3.3 Codes and Standards The FuelSolutions' W21 CANISTER shell structural components are designed in accordance with Subsection NB of the ASME Code, and the basket structural components are designed in accordance with Subsection NG of the ASME Code.
Exceptions to the code are listed in Table 4.1-1.
4.1.3.4 Fabrication Exceptions to Codes, Standards, and Criteria Proposed alternatives to Subsections NB and NG of the ASME Code, including exceptions allowed by Section 4.1.3.3, may be used when authorized by the Director of the Office of Nuclear Material Safety and Safeguards or Designee.
The applicant should demonstrate that:
- 1. The proposed alternatives would provide an acceptable level of quality and safety, or
- 2. Compliance with the specified requirements of ASME Code,Section III, would result in hardship or unusual di fficulty without a compensating increase in the level of quality and safety.
Requests for exception in accordance with this section should be submitted in accordance with 10CFR72.4.
4.2 Storage Pad Constraints on the storage pad are discussed in Section 4.2 of the Storage System Technical Specification.
4.3 Site Specific Parameters and Analyses See the Storage System Technical Specification Section 4.3 for discussion of site specific parameters and analyses.
FuelSolutions' W21 Canister 4.0-2 Renewed Amendment 4
Administrative Controls 5.0 5.0 ADMINISTRATIVE CONTROLS
5.1 Training Modules See the Storage System Technical Specification for the applicable information.
5.2 Preoperational Testing and Training Exercises See the Storage System Technical Specification for the applicable information.
5.3 Programs 5.3.1-5.3.5 See the Storage System Technical Specification for the applicable information.
5.3.6 Vacuum Drying Program The FuelSolutions' W21 CANISTER has been evaluated for allowable fuel cladding temperature during LOADING and STORAGE OPERATIONS. During LOADING OPERATIONS, the fuel cladding temperature is limited to 400°C to assure cladding integrity.
This program shall establish administrative controls and procedures to assure that the spent fuel cladding does not exceed the temperature limit during LOADING OPERATIONS. For a CANISTER loaded with fuel with a total heat load of 22.0 kW, the total vacuum drying cycle shall be limited to 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. If the vacuum drying LCO 3.1.2 has not been satisfied, the CANISTER shall be backfilled with helium for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, vacuum dried for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, backfilled for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, etc., until the LCO is met.
For a heat load of 17.5 kW or lower, there is no time limit on the initial vacuum drying cycle.
For heat loads greater than 17.5 kW but less than 22.0 kW, the program shall either use the 22.0 kW requirements, or establish suitable time limits to maintain the cladding temperature to less than or equal to 400°C for the specific CANISTER heat load.
5.3.7 Cladding Oxide Thickness Measurement Program For fuel with a burnup exceeding 45 GWd/MTU, it is necessary to verify that cladding oxide layer thickness for fuel assemblies to be stored does not exceed 70µm.
This program shall establish administrative cont rols and procedures to verify oxide layer thickness by measurement of a statistical sample of limiting fuel assemblies.
5.3.8 Storage Cask Periodic Monitoring Program See the STORAGE CASK Technical Specifications for the applicable information.
5.3.9 Aging Management Program See the Storage System Technical Specification for the applicable information.
5.4 Special Requirements for First System in Place The heat transfer characteristics of the cask system will be recorded by temperature measurements of the first STORAGE CASK placed in service with a heat load equal to or greater than 10kW. In accordance with 10CFR72.4, a letter report summarizing the results of the measurements shall be submitted to the NRC.
For each cask subsequently loaded with a higher heat load (up to the 22.0 kW limit), the calculation and measured temperature data shall be reported to the NRC at every 2 kW increase.
The calculation and comparison need not be reported to the NRC for STORAGE CASKS that are subsequently loaded with lesser loads then the latest reported case.
Cask users may satisfy these requirements by referencing validation test reports submitted to the NRC by other users.
FuelSolutions' W21 Canister 5.0-1 Renewed Amendment 4