ML22024A030

Breakout Questions - Trp 42 - ASME XI, Subsection Iwl

ML22024A030
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Site:	Oconee
Issue date:	01/20/2022
From:	Angela Wu NRC/NRR/DNRL/NLRP
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Wu A, 301-415-2995
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ONS SLRA: Breakout Questions SLRA Section B2.1.29 - ASME XI, Subsection IWL AMP TRP: 042

Question SLRA SLRA Background / Issue Discussion Question / Request Number Section Page (As applicable/needed) 1 B2.1.29 N/A AR 01817471 on CERTREC discusses a How has this issue been lack of adequate records for IWL exams addressed to ensure proper on Unit 2. records are taken moving forward? Can you point to inspection procedures that clearly identify what needs to be recorded during each inspection?

2 B2.1.29 B-205 SLRA OE #2 and associated Was the coating system OE #2 AR01828181 discusses cracking on the installed?

Unit 1 dome and the possible installation Has similar cracking been of a protective coating system. seen on Units 2 or 3 and if so were similar corrective actions taken?

Please provide ARs or WOs on the portal documenting the resolution (i.e., WO showing the installation of the coating system, follow -up inspections, etc.)

3 B2.1.29 B-205 SLRA OE#3 discusses high concrete Were Units 2 and 3 checked OE #3 temperatures around the Unit 1 main for similar high temperature steam penetration. issues? If so what was the resolution, if not why not?

4 B2.1.29 N/A AR01830970 discusses spalling around If available, please load tendon bearing plates. pictures of this issue on to Certrec for staff review.

5 B2.1.29 N/A AR02081433 discusses indications found Please provide documentation during tendon inspections. on Certrec sh owing the

resolution of these issues.

Include photos if available.

6 N/A N/A NRC Information Notice (IN) 99-10 notes Explain if the grease leakage that during a 1998 walkdown NRC staff is an ongoing issue or if the observed tendon grease leakage from stains seen during recent hoop tendons on all three containments. walkdowns are inactive and During the recent SLR walkdowns, NRC indications from past leakage.

staff once again identified grease stains on the containment structures. If the leakage is active please explain how it is being age-managed.

7 3.5.2.2.1.7 3-SRP-SLR guidance says a plant-specific Provide documentation on the 1211 program is not necessary if the concrete portal demonstrating the air was constructed with air content of 3 to 8 content of the containment percent. structures.

8 4.5, B3.4 B-204 Section 4.5 of SLR-ONS-AMPR-X.S1 Please explain this apparent and (Containment Tendon AMP Basis Doc) discrepancy and elaborate on B2.1.29 states, the calculations for tendon the justification for the prestressing losses and predicted tendon exception in SLRA Section forces are consistent with NRC RG B2.1.29.

1.35.1.

However, SLRA Section B2.1.29 (ASME Section XI, Subsection IWL) contains an exception to element 6 which states, the predicted lower limit values consider the same factors, but are not in complete accordance with RG 1.35.1 for determining predicted lower limit values.