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{{#Wiki_filter:1/16/2013
{{#Wiki_filter:1/16/2013
-Technical Specifications Task ForceTSTF A Joint Owners Group ActivityRelocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee ControlStandard Tech Specs Administrative  
-Technical                                               Specifications Task Force TSTF                                                A Joint Owners GroupActivity Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control Standard Tech Specs Administrative Controls, [Primary]
: Controls,  
Containment Leakage Rate Testing Program, Option B, states the following:
[Primary]
: b. The calculatedpeak containmentinternalpressurefor the design basis loss of coolant accident,Pa, is [45 psig]. The containmentdesign pressure is [50 psig].
Containment Leakage Rate Testing Program, Option B, states thefollowing:
: c. The maximum allowable containment leakage rate, La, at Pa, shall be []% of containmentair weight per day.
: b. The calculated peak containment internal pressure for thedesign basis loss of coolant accident, Pa, is [45 psig]. Thecontainment design pressure is [50 psig].c. The maximum allowable containment leakage rate, La, at Pa, shallbe []% of containment air weight per day.d. Leakage rate acceptance criteria are:2. Air lock testing acceptance criteria are:a) Overall air lock leakage rate is_[O. 05 La] when tested atNote that paragraph b states the exact value of Pa, not a limit.(Contined)
: d. Leakage rate acceptancecriteriaare:
I Technical Specifications Task ForceTSTF A Joint Owners Group ActivityRelocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control" Recently, some NSSS vendors have identified errors in theinput values or calculations of peak containment internalpressure.
: 2. Air lock testing acceptance criteriaare:
The difference between the TS and recalculated values are typically small and encompassed by the pressureused for performing the containment leak rate tests.* However, because the TS specify the exact value and not alimit, a change to the TS is required.
a) Overall airlock leakage rate is_*[O. 05 La] when tested at Note that paragraph b states the exact value of Pa, not a limit.
-We have identified at least five license amendment requests that have been submitted or are underdevelopment.
(Contined)
(Continued) 1 1/16/2013
I                                         Technical Specifications Task Force TSTF                                                A Joint Owners GroupActivity Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control
___ Technical Specifications Task ForceTSTF A Joint Owners Group ActivityRelocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control" The Statements of Consideration for Appendix J, Option B(9/26/95) state that Pa is specified in the TS. Therefore, TSTF-52 (which implemented Appendix J, Option B) includedPa in the TS." An August 2007 FRN added "or associated bases," allowingthe Pa value to be located in the TS or the Bases.* The TSTF is interested in pursuing a change to the STS toeither relocate the Pa value to the Bases or to replace theexact value with a limit:-The calculated peak containment internal pressure for thedesign basis loss of coolant accident, Pa is < [45 psig].(Cotiued)
" Recently, some NSSS vendors have identified errors in the input values or calculations of peak containment internal pressure. The difference between the TS and recalculated values are typically small and encompassed by the pressure used for performing the containment leak rate tests.
____ Technical Specifications Task ForceTSTF A Joint Owners Group ActivityRelocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control" Does the NRC staff see any roadblocks to relocating the Pavalue to the Bases, with control of future changes under50.59?" Does the NRC staff see any roadblocks to replacing the Paexact value with an upper limit, which would be used for leakrate testing?2}}
* However, because the TS specify the exact value and not a limit, a change to the TS is required.
        - We have identified at least five license amendment requests that have been submitted or are under development.
(Continued) 1
 
1/16/2013
___                                     Technical Specifications Task Force TSTF                                          A Joint Owners GroupActivity Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control
" The Statements of Consideration for Appendix J, Option B (9/26/95) state that Pa is specified in the TS. Therefore, TSTF-52 (which implemented Appendix J, Option B) included Pa in the TS.
" An August 2007 FRN added "or associated bases," allowing the Pa value to be located in the TS or the Bases.
* The TSTF is interested in pursuing a change to the STS to either relocate the Pa value to the Bases or to replace the exact value with a limit:
      - The calculatedpeak containmentinternal pressurefor the design basis loss of coolant accident,Pa is < [45 psig].
(Cotiued)
____                                     Technical Specifications Task Force TSTF                                          A Joint Owners GroupActivity Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control
" Does the NRC staff see any roadblocks to relocating the Pa value to the Bases, with control of future changes under 50.59?
" Does the NRC staff see any roadblocks to replacing the Pa exact value with an upper limit, which would be used for leak rate testing?
2}}

Latest revision as of 13:58, 31 October 2019

TSTF Handout from January 17, 2013, Meeting Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control
ML15084A211
Person / Time
Site: Technical Specifications Task Force
Issue date: 01/16/2013
From:
Technical Specifications Task Force
To:
Office of Nuclear Reactor Regulation
References
Download: ML15084A211 (2)
v • d • e


Text

1/16/2013

-Technical Specifications Task Force TSTF A Joint Owners GroupActivity Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control Standard Tech Specs Administrative Controls, [Primary]

Containment Leakage Rate Testing Program, Option B, states the following:

b. The calculatedpeak containmentinternalpressurefor the design basis loss of coolant accident,Pa, is [45 psig]. The containmentdesign pressure is [50 psig].
c. The maximum allowable containment leakage rate, La, at Pa, shall be []% of containmentair weight per day.
d. Leakage rate acceptancecriteriaare:
2. Air lock testing acceptance criteriaare:

a) Overall airlock leakage rate is_*[O. 05 La] when tested at Note that paragraph b states the exact value of Pa, not a limit.

(Contined)

I Technical Specifications Task Force TSTF A Joint Owners GroupActivity Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control

" Recently, some NSSS vendors have identified errors in the input values or calculations of peak containment internal pressure. The difference between the TS and recalculated values are typically small and encompassed by the pressure used for performing the containment leak rate tests.

  • However, because the TS specify the exact value and not a limit, a change to the TS is required.

- We have identified at least five license amendment requests that have been submitted or are under development.

(Continued) 1

1/16/2013

___ Technical Specifications Task Force TSTF A Joint Owners GroupActivity Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control

" The Statements of Consideration for Appendix J, Option B (9/26/95) state that Pa is specified in the TS. Therefore, TSTF-52 (which implemented Appendix J, Option B) included Pa in the TS.

" An August 2007 FRN added "or associated bases," allowing the Pa value to be located in the TS or the Bases.

  • The TSTF is interested in pursuing a change to the STS to either relocate the Pa value to the Bases or to replace the exact value with a limit:

- The calculatedpeak containmentinternal pressurefor the design basis loss of coolant accident,Pa is < [45 psig].

(Cotiued)

____ Technical Specifications Task Force TSTF A Joint Owners GroupActivity Relocation of Calculated Peak Containment Internal Pressure (Pa) to Licensee Control

" Does the NRC staff see any roadblocks to relocating the Pa value to the Bases, with control of future changes under 50.59?

" Does the NRC staff see any roadblocks to replacing the Pa exact value with an upper limit, which would be used for leak rate testing?

2

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