ML25183A342
| ML25183A342 | |
| Person / Time | |
|---|---|
| Issue date: | 06/30/2025 |
| From: | Jeffrey Poehler NRC/RES/DE |
| To: | |
| JEFF POEHLER 3014158353 | |
| Shared Package | |
| ML25183A340 | List: |
| References | |
| Download: ML25183A342 (1) | |
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Z AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS Panelist 1 Panelist 2 Panelist 3 Average ImportanceUncertaintyKnowledge ImportanceUncertaintyKnowledge ImportanceUncertaintyKnowledge Recommendation ID title of recommendation Scope, objectives, and/or topic modifications Score Score Score Rationale Score Score Score Rationale Score Score Score Rationale Importanc e (avg)
Uncertaint y (avg)
Knowled ge (avg) error bars Import Uncert. Know error More research could be used to gain knowledge on a topic expected to be important to safety More research could reduce uncertainty and clarify topic importance More research could improve knowledge but topic not expected to be safety significant Topic expected to have safety significance but likely could be addressed without additional research Topic may have safety significance but sufficient knowledge exists to manage Topic not expected to have safety significance and sufficient knowledge exists H/M/L H/M/L K/PK/UK H/M/L H/M/L K/PK/UK H/M/L H/M/L K/PK/UK RRS-1 Evaluate repair strategies for nuclear plants beyond 80 years.
H M
PK Structural repairs will become increasingly necessary due to cumulative aging effects for plants exceeding 80+ operation.
H L
K Sharing iformation within domestic fleets may be difficult because of corporate rules.
Repair strategies may differ from fleet to fleet and maybe affected from locality to locality unless performed by a nationwide or international contractor. Information within each fleet and state run organizations, however, is/would be available and benefit the included plants.
Applicable technology at international level may also be difficult to obtain, hence the markings.
M M
PK Based on OpE, explore proven repair strategies in nuclear facilities including non-nuclear industry for timely actions.
2.7 1.7 1.7 0.277778 2.6667 1.6667 1.7000 0.277778 1
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1 2
RRS-2 Research and validate new materials, coatings, and methodologies. Address implications of transitioning to new cement standards.
M M
PK Researching and validating new materials and methods, including the shift to new cement standards, is important for ensuring durable and safe structures. While less urgent, this work is worthwhile given the widespread use of these materials and their significant impact on long-term performance.
H L
PK Reserching applicability of new materials to specific applications is costly, takes time, and specific laboratory environments. It may be easier done through cost sharing through specialized the few available research organizations, but doable.
H M
PK Materials and methods may become obsolete with time.
Pros and cons for newer materials and methods should be evaluated.
2.7 1.7 2.0 0.277778 2.6667 1.6667 2.0150 0.277778 2
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3 2
RRS-3 Develop databases for repair methods and performance data. Share best practices through collaborative forums.
H M
PK Repairing databases and sharing best practices are highly valuable for promoting better aging management and ensuring safe operation for plants 80+ years.
H L
K Sharing iformation within domestic fleets may be difficult because of corporate rules.
Repair strategies may differ from fleet to fleet and maybe affected from locality to locality unless performed by a nationwide or international contractor. Information within each fleet and state run organizations, however, is be available and would benefit the included plants. Applicable technology at international level may also be diificult, hence the markings.
H M
PK Of significant value and benefit.
Industry partners and stakeholders to collaborate.
3.0 1.7 1.7 0.277778 2.9700 1.6667 1.6217 0.277778 3
RRS-4 Implement systematic repair program to enhance structural durability and resilience.
M M
K It will support safe operation for plants exceeding 80+ years.
However, it may be challenging due to plant-specific conditions.
L M
K Similar to a scheduled systematic oil change of internal combustion engines, the approach would add life, improve durabilty, and resilience for the unforseen.
Systematic application without options for deferals may counter corporate thinking.
H M
PK RRS-5 2.0 2.0 1.3 0.333333 2.0000 2.0000 1.3783 0.333333 4
RRS-5 Leverage proven repair techniques tailored to specific aging mechanisms. Develop plant-specific repair guidelines.
H M
PK Structural repairs will become increasingly necessary due to cumulative aging effects for plants exceeding 80+ operation.
H L
K Sharing iformation within domestic fleets may be difficult because of corporate rules.
Repair strategies may differ from fleet to fleet and maybe affected from locality to locality unless performed by a nationwide or international contractor. Information within each fleet and state run organizations, however, is/would be available and benefit the included plants.
Applicable technology at international level may also be difficult to obtain, hence the markings.
M M
PK Based on OpE, explore proven repair strategies in nuclear facilities including non-nuclear industry for timely actions.
2.7 1.7 1.7 0.277778 2.6667 1.6667 1.6517 0.277778 5
RRS-1 RRS-2 RRS-3 RRS-4 RRS-5 1
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2 Importance Knowledge Session 8 - Civil Structures, Concrete and Components - Repair and Replacement Strategies (RRS)
High Low Known Unknown