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{{#Wiki_filter:NRC Staff's Questions for April 9, 2018 Public Meeting with NuScale Regarding Its DCA Chapter 20 | {{#Wiki_filter:NRC Staff's Questions for April 9, 2018 Public Meeting with NuScale Regarding Its DCA Chapter 20 | ||
: 1. The staff is unclear whether NuScale design conform to NEI 12-06, Rev. 2, partially, or fully. NuScale FSAR (Tier 2 Table 1.9-2) and other applicable documents need to clearly indicate conformance to the applicable revision(s) of NEI 12-06. | : 1. The staff is unclear whether NuScale design conform to NEI 12-06, Rev. 2, partially, or fully. NuScale FSAR (Tier 2 Table 1.9-2) and other applicable documents need to clearly indicate conformance to the applicable revision(s) of NEI 12-06. | ||
: 2. How does the UHS instrument-specific backup batteries | : 2. How does the UHS instrument-specific backup batteries | ||
, and replaceable battery packs | , and replaceable battery packs | ||
, satisfy the NEI 12-06 guidance with respect to "protection | , satisfy the NEI 12-06 guidance with respect to "protection | ||
"? FSAR and TR-0816-50797-P need to be revised to include a discussion of conformance to NEI 12-06. | "? FSAR and TR-0816-50797-P need to be revised to include a discussion of conformance to NEI 12-06. | ||
: 3. Wh at are the COLA responsibilities on how the UHS instrument-specific backup batteries are to be protected, maintained, and periodically tested? Where are these responsibilities discussed in the DCA? 4. Since the onsite power sources (EDSS and instrument-specific backup battery packs) are used to provide power to the UHS instruments for monitoring of key safety functions following a BDBEE, how are the UHS instruments powered during Phases 1, and 3, including up to and beyond 30 days? 5. The staff understands that the UHS instrument-specific backup battery pack and UHS replacement battery pack are considered portable equipment. Are these batteries part of the Phase 1 strategy? | : 3. Wh at are the COLA responsibilities on how the UHS instrument-specific backup batteries are to be protected, maintained, and periodically tested? Where are these responsibilities discussed in the DCA? 4. Since the onsite power sources (EDSS and instrument-specific backup battery packs) are used to provide power to the UHS instruments for monitoring of key safety functions following a BDBEE, how are the UHS instruments powered during Phases 1, and 3, including up to and beyond 30 days? 5. The staff understands that the UHS instrument-specific backup battery pack and UHS replacement battery pack are considered portable equipment. Are these batteries part of the Phase 1 strategy? | ||
: 6. Where are the COLA responsibilities specified in the DCA to assure the power is provided to the UHS instruments during all Phases? | : 6. Where are the COLA responsibilities specified in the DCA to assure the power is provided to the UHS instruments during all Phases? | ||
: 7. Since the NuScale design relies on onsite plant equipment for Phase 3, how does the design conform to the Phase 3 guidance of relying on offsite resources, as discussed in NEI 12-06, Rev. | : 7. Since the NuScale design relies on onsite plant equipment for Phase 3, how does the design conform to the Phase 3 guidance of relying on offsite resources, as discussed in NEI 12-06, Rev. | ||
2? 8. At what location s are the UHS instruments monitored (i.e. MCR, RSS or other location)? | 2? 8. At what location s are the UHS instruments monitored (i.e. MCR, RSS or other location)? | ||
Revision as of 17:43, 25 April 2019
| ML18085A072 | |
| Person / Time | |
|---|---|
| Site: | NuScale |
| Issue date: | 03/26/2018 |
| From: | Omid Tabatabai NRC/NRO/DNRL/LB1 |
| To: | |
| Tabatabai, Omid | |
| References | |
| Download: ML18085A072 (1) | |
Text
NRC Staff's Questions for April 9, 2018 Public Meeting with NuScale Regarding Its DCA Chapter 20
- 1. The staff is unclear whether NuScale design conform to NEI 12-06, Rev. 2, partially, or fully. NuScale FSAR (Tier 2 Table 1.9-2) and other applicable documents need to clearly indicate conformance to the applicable revision(s) of NEI 12-06.
- 2. How does the UHS instrument-specific backup batteries
, and replaceable battery packs
, satisfy the NEI 12-06 guidance with respect to "protection
"? FSAR and TR-0816-50797-P need to be revised to include a discussion of conformance to NEI 12-06.
- 3. Wh at are the COLA responsibilities on how the UHS instrument-specific backup batteries are to be protected, maintained, and periodically tested? Where are these responsibilities discussed in the DCA? 4. Since the onsite power sources (EDSS and instrument-specific backup battery packs) are used to provide power to the UHS instruments for monitoring of key safety functions following a BDBEE, how are the UHS instruments powered during Phases 1, and 3, including up to and beyond 30 days? 5. The staff understands that the UHS instrument-specific backup battery pack and UHS replacement battery pack are considered portable equipment. Are these batteries part of the Phase 1 strategy?
- 6. Where are the COLA responsibilities specified in the DCA to assure the power is provided to the UHS instruments during all Phases?
- 7. Since the NuScale design relies on onsite plant equipment for Phase 3, how does the design conform to the Phase 3 guidance of relying on offsite resources, as discussed in NEI 12-06, Rev.
2? 8. At what location s are the UHS instruments monitored (i.e. MCR, RSS or other location)?
Where does the FSAR discuss information regarding lighting (and the power sources for the lighting
) for the trained personnel to monitor UHS parameters? Also, where can the staff find discussion regarding the lighting available for the personnel to replace UHS instrument-specific battery packs? 9. The staff's understanding is that the power sources (batteries) used for the UHS/SFP level monitoring last 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, and the replacement batteries also last 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
Describe how is the 30-day coping timeframe accomplished?