ML19319B318
| ML19319B318 | |
| Person / Time | |
|---|---|
| Issue date: | 11/13/2019 |
| From: | NRC/OCIO |
| To: | |
| Shared Package | |
| ML19319B303 | List: |
| References | |
| FOIA, NRC-2018-000831 | |
| Download: ML19319B318 (5) | |
Text
NRC High-Priority Data Needs for Harvesting NRC Staff March 7, 2017
Metals RPV
- High fluence & high shift vessel with well-established unirradiated properties (or a means to estimate them)
- Through thickness section to validate fluence & attenuation models
- Measure fluence, toughness, & chemistry as a function of through-thickness position
- Samples from virtually any vessel
- Of sufficient size to enable measurement of both the Charpy transition curve and master curve transition temperature T0
- This testing
- Enables demonstration of the conservatism of regulatory approaches for transition temperature prediction
- Provides data supporting evolution from the use of correlative (Charpy-based) to direct measurement (fracture toughness-based) approaches 2
Metals CASS and Internals
- High fluence reactor internals
- >50 dpa 304 SS from high core outlet temp plant
- Bounding temperature and high fluence for void swelling
- Thermally aged unirradiated CASS
- >30 years at ~320°C; Validate accelerated aging data
- Moderate fluence (1-2 dpa) CASS
- Bolster technical basis for embrittlement in this fluence range Components with known flaws
- Example: weld overlays over known flaws
- NDE evaluations or to assess effectiveness of mitigation techniques Components with limiting fatigue life
- Confirm fatigue calculations are accurate by inspecting for flaws 3
Electrical
- Cables
- Low and medium voltage cables
- Cables protected with fire retardant coating
- Electrical components
- 1E MOVs from harsh and mild environments
- 1E Air operated valves; 4160 1E breakers
- 1E Molded case breakers 480V, 250V DC, 125 VDC,
- 1E Relays from mild environment GE - HFA, Agastat timing relays, any from Westinghouse, Potter Brumfield, Stuthers Dunn etc.,
- Electrical penetrations; Batteries
- Fire research interest
- Electrical enclosures
4
Concrete
- Structures exposed to high radiation
- Post-tensioned structures
- Corrosion of reinforcing steel, tendon, liner, embedment
- Spent fuel pool and transfer canal-boric acid attack on concrete in PWRs
- Alkali Aggregate Reaction
- Large structural sections for testing 5