ML22024A041

Breakout Questions - Trp 140 - Secondary Shield Wall Tendon Surveillance

ML22024A041
Person / Time
Site:	Oconee
Issue date:	01/20/2022
From:	Angela Wu NRC/NRR/DNRL/NLRP
To:
Wu A, 301-415-2995
Shared Package
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References
Download: ML22024A041 (2)

Text

ONS SLRA: Breakout Questions SLRA Section B4.1, Secondary Shield Wall Tendon Surveillance (TRP : 140)

Question SLRA Section SLRA Background / Issue Discussion Question / Request Number Page (As applicable/needed) 1 3.5 Aging 3-1375 In Table 3.5.2-2, Containments, 1-Describe why TLAA Management Structures, and Component Supports - assessments of SSW of Reactor Building - Aging Management tendons were not C ontainments, Evaluation, in the ONS SLRA, the performed.

Structures, applicant identified the requirement of and TLAA evaluations of Secondary Shield 2-Clarify, whether the C omponent Wall (SSW ) tendon wires due to the applicant performs tendon Supports aging effects of loss of prestressing. lift -off test force s vs.

time, assessments of the Results In Section B4.1, SSW Tendon horizontal tendons.

Tables: Surveillance, in ONS SLRA and report Containments, SLR-ONS -AMPR -PS.1, Revision 1, the 3-Clarify, why only the lift-of Structures, applicant stated the SSW tendon tests performed on the and surveillance AMP is an existing horizontal tendons. Even Component condition monitoring program that though, there are three Supports manages aging effects associated with types of tendons used on AMR the tendons and tendon anchorage of the SSWs: (1) Vertical, (2)

SSWs in the reactor buildings. The Horizontal (Lower, Middle, applicant also performs tendon lift-off Upper) and (3) Diagonal tests randomly selected horizontal Tie Tendons.

tendons every other refueling outage in accordance with station procedures. 4-Provide the procedure performing the lift-off tests.

Procedure MP/0/A/1400/021, Revision Is it independent from the 017, Tendon - SSW Surveillance, procedure, refers to specification, OSS-OO11F.00-MP/0/A/1400/021, 000001, May 5, 1982, Specification for Revision 017?

Reactor Building SSW Post-Tension Tendon Surveillance, which provides specifications for the reactor buildings SSW post tension tendon surveillance.

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In Section 7.3, Tendon Selection, of OSS-OO11F.00-000001, the applicant provides five (5) provisions for selecting tendons to be inspected of every types of SSWs tendons every other refueling outage.

2 none none The applicant did not provide the health Provide the recent health reports related to the B4.1, SSW reports of the AMP.

Tendon Surveillance, in the eRR.

Reviewing this information will help understand the recent operating experience at ONS.

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