ML15084A211

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)

Text

1/16/2013-Technical Specifications Task ForceTSTF A Joint Owners Group ActivityRelocation of Calculated Peak ContainmentInternal Pressure (Pa) to Licensee ControlStandard Tech Specs Administrative Controls, [Primary]Containment Leakage Rate Testing Program, Option B, states thefollowing: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)I Technical Specifications Task ForceTSTF A Joint Owners Group ActivityRelocation of Calculated Peak ContainmentInternal Pressure (Pa) to Licensee Control" Recently, some NSSS vendors have identified errors in theinput values or calculations of peak containment internalpressure. The difference between the TS and recalculatedvalues 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.-We have identified at least five license amendmentrequests that have been submitted or are underdevelopment.(Continued)1 1/16/2013___ Technical Specifications Task ForceTSTF A Joint Owners Group ActivityRelocation of Calculated Peak ContainmentInternal 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)____ Technical Specifications Task ForceTSTF A Joint Owners Group ActivityRelocation of Calculated Peak ContainmentInternal 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