ML25183A341
| ML25183A341 | |
| Person / Time | |
|---|---|
| Issue date: | 06/30/2025 |
| From: | Jeffrey Poehler NRC/RES/DE |
| To: | |
| JEFF POEHLER 3014158353 | |
| Shared Package | |
| ML25183A340 | List: |
| References | |
| Download: ML25183A341 (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 AT 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 ECC-1 Assess impacts of higher reservoir temperatures on nuclear plant structures and cooling systems.
L M
PK This may have direct impact on water-control structures only.
L L
K For the most part currently pursued. The proposed research could be viewed as the low hanging fruit.
L M
PK Track climate change and take additional measures if applicable. Awareness is important.
1.0 1.7 1.7 0.277778 1.1000 1.6667 1.6667 0.277778 1
2 1
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ECC-2 Evaluate the resilience of concrete structures under changing climate M
M PK For plants exceeding 80+ years, accelerated degradations could happen. Evaluating concrete resilence is important for predicting how long these plants can be safely operated.
H L
K Concrete construction offers long lasting, resilient structures often exceeding code requirements and margins that counter natural disasters and proven to be repairable rather than being replaced.
M L
PK Concrete is in general resillent, 2.3 1.3 1.7 0.222222 2.3333 1.3333 1.6667 0.222222 2
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ECC-3 Investigate chloride diffusion and corrosion due to sea level rise.
L M
PK Less impact on plants than other environmental factors. There are no impact for the plants away from the sea.
L L
K For the most part currently pursued. The proposed research could be viewed as the low hanging fruit.
L M
PK Important for the plants near the coasts; in general it is part of the aging management.
Additional measures may be needed if it exceeds the original design criteria.
1.0 1.7 1.7 0.277778 1.1000 1.6667 1.6217 0.277778 3
ECC-4 Analyze structural impacts of increased tornadoes and tropical cyclones, extreme precipitation, flooding, and rising sea levels.
L M
PK These events are considered in the design basis, and have minor impact on degradations and aging management.
L L
K Currently pursued.The proposed research could be viewed as the low hanging fruit.
M M
PK Additional measures may be needed if it exceeds the original design criteria.
1.3 1.7 1.7 0.277778 1.3633 1.6667 1.7167 0.277778 4
ECC-1 ECC-2 ECC-3 ECC-4 1
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2 Importance Knowledge Session 8 - Civil Structures, Concrete and Components - Effects of Climate Change (ECC)
High Low Known Unknown