ML18096B703
| ML18096B703 | |
| Person / Time | |
|---|---|
| Site: | Clinch River |
| Issue date: | 03/05/2018 |
| From: | NRC |
| To: | NRC/NRO/DNRL |
| References | |
| Download: ML18096B703 (4) | |
Text
1 ClinchRiverESPHFNPEm Resource From:
Sutton, Mallecia Sent:
Monday, March 5, 2018 2:20 PM To:
Schiele, Raymond Joseph Cc:
Cook, Christopher; Mazaika, Michael; Quinlan, Kevin; Colaccino, Joseph; Fetter, Allen; Harvey, Brad; Akstulewicz, Frank
Subject:
Met: Feedback on Sections 2.0 and 2.3.1 Rev 1 SSAR Attachments:
Feedback on Clinch River ESP SSAR Rev 1.pdf Ray, As discussed, attached are some suggested edits related to Rev 1 SSAR to be discussed during our 3pm call this afternoon. If you have any questions, please dont hesitate to contact me.
Thanks Mallecia Mallecia Sutton Project Manager NRO/DNRL/LB3 U.S. Nuclear Regulatory Commission 301-415-0673
Hearing Identifier:
ClinchRiver_ESP_HF_NonPublic Email Number:
503 Mail Envelope Properties (Mallecia.Sutton@nrc.gov20180305142000)
Subject:
Met: Feedback on Sections 2.0 and 2.3.1 Rev 1 SSAR Sent Date:
3/5/2018 2:20:10 PM Received Date:
3/5/2018 2:20:00 PM From:
Sutton, Mallecia Created By:
Mallecia.Sutton@nrc.gov Recipients:
"Cook, Christopher" <Christopher.Cook@nrc.gov>
Tracking Status: None "Mazaika, Michael" <Michael.Mazaika@nrc.gov>
Tracking Status: None "Quinlan, Kevin" <Kevin.Quinlan@nrc.gov>
Tracking Status: None "Colaccino, Joseph" <Joseph.Colaccino@nrc.gov>
Tracking Status: None "Fetter, Allen" <Allen.Fetter@nrc.gov>
Tracking Status: None "Harvey, Brad" <Brad.Harvey@nrc.gov>
Tracking Status: None "Akstulewicz, Frank" <Frank.Akstulewicz@nrc.gov>
Tracking Status: None "Schiele, Raymond Joseph" <rjschiele@tva.gov>
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 326 3/5/2018 2:20:00 PM Feedback on Clinch River ESP SSAR Rev 1.pdf 157780 Options Priority:
Standard Return Notification:
No Reply Requested:
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Recipients Received:
RHM/RMET Feedback on Sections 2.0 and 2.3.1 of Revision 1 to the Clinch River ESP SSAR SSAR Table 2.0-1
- 1. Winter Precipitation (Sheet 1 of 5)
- a. 100-Year Snowpack - Delete this entry from Table 2.0-1 as it is discussed in SSAR Subsection 2.3.1.3.6.2 as one of the four elements used to determine the Normal Winter Precipitation Event consistent with DC/COL-ISG-007.
- b. 48-hour Probable Maximum Winter Precipitation (PMWP) - Delete this entry from Table 2.0-1 as it is redundant to the Table 2.0-1 entry Extreme Liquid Winter Precipitation Event.
- c. Normal Winter Precipitation Event - Change the description of this site characteristic to read:
The maximum ground level weight of the 1) 100-year return snowpack (snow cover), 2) historical snowpack (snow cover), 3) 100-year return 2-day snowfall event, or 4) historical maximum 2-day snowfall event.
- d. Extreme Frozen Precipitation Event -
- i.
In order to be consistent with the terminology in DC/COL-ISG-007, change the title of this site characteristic to read:
Extreme Frozen Winter Precipitation Event ii. Change the description of this site characteristic to read:
The maximum ground level weight of the 1) 100-year return 2-day snowfall event or
- 2) historical maximum 2-day snowfall event
- e. Extreme Liquid Precipitation Event -
- i.
In order to be consistent with the terminology in DC/COL-ISG-007, change the title of this site characteristic value to read:
Extreme Liquid Winter Precipitation Event ii. Change this site characteristic value to read 23.5 in iii. Change the description of this site characteristic value to read:
The extreme liquid winter precipitation event is defined as the theoretically greatest ground-level depth of precipitation (in inches of water) for a 48-hour period that is physically possible over a 25.9 square kilometer (10 square mile) area at a particular geographical location during those months with the historically highest snowpacks.
- 2. Site Characteristic Ambient Air Temperatures (Sheet 3 of 5)
- a. 0% Annual Exceedance Values - Confirm and, if so, clarify in Table 2.0-1 as to whether the 0% annual exceedance dry-bulb and coincident wet-bulb temperatures, the non-coincident wet-bulb temperature, and the minimum dry-bulb temperature represent historical limits excluding peaks less than 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, as specified in EPRIs Advanced Light Water Reactor Utility Requirements Document (see Table 1.2-6, Envelope of ALWR Plant Site Design Parameters, in Volume 2, Revision 8).
- b. Coincident Wet-Bulb Values - Define what the coincident wet-bulb temperature values represent (e.g., the overall maximum wet-bulb temperature, the mean of the wet-bulb temperature, or an estimated wet-bulb temperature value assumed to be coincident with the indicated dry bulb temperature).
SSAR Subsection 2.3.1.3.6.2
- 1. Para. 5, Sent. 1 - Indicates that the U.S. Snow Climatology data base was the resource used to determine the 100-year return period 48-hour (two-day) snowfall event for the Oak Ridge and Knoxville observing stations. The U.S. Snow Climatology data base has not been available for several years. Other referenced on-line data bases included the date the information was accessed. Provide the date that the U.S. Snow Climatology data base was accessed for this information.
SSAR Subsection 2.3.1.4
- 1. The following site characteristics are described as being calculated, but their values are not presented in SSAR Table 2.0-1 or any other table in the SSAR. Please explain the intent of stating that the following site characteristics are calculated but not providing the corresponding values in the SSAR:
- a. dry-bulb temperatures at 5% and 95% exceedance levels (note: these values have recently been added to the NuScale list of site parameter values; see NuScales response to eRAI 9186, Question 02.03.01-6, ML18044A695)
- b. coincident wet-bulb temperatures at 5% and 100% exceedance levels (note: the 5%
value has recently been added to the NuScale list of site parameter values; see NuScales response to eRAI 9186, Question 02.03.01-6, ML18044A695)
- c. non-coincident wet-bulb temperature at 5%, 95%, 98%, 99%, and 99.6% exceedance levels
- d. 100-year return minimum wet-bulb temperature