ML18064A056
| ML18064A056 | |
| Person / Time | |
|---|---|
| Site: | Clinch River |
| Issue date: | 02/14/2018 |
| From: | - No Known Affiliation |
| To: | |
| References | |
| +reviewed | |
| Download: ML18064A056 (3) | |
Text
1 ClinchRiverESPHFNPEm Resource From:
Schiele, Raymond Joseph <rjschiele@tva.gov>
Sent:
Wednesday, February 14, 2018 4:12 PM To:
Sutton, Mallecia Cc:
Stout, Daniel Paul; Young, Michael Stephen Alexander; Montague, Kelvin Jevon; Holcomb, John Michael
Subject:
[External_Sender] FW: Clinch River: Met Question on Vector WD and Scalar WS
- Mallecia, In response to your email below, TVA has reviewed SSAR Table 1.9-1 and 1.9-2 and has confirmed TVAs commitments associated with RG 1.23. As noted in the background provided below, Section 5.3.1 of ANSI/ANS-3.11-2005 states that the transport wind direction for straight-line Gaussian models should be based on the scalar mean (or unit vector) wind direction. Section 2 of ANSI/ANS-3.11-2005 states, the word should is used to denote a recommendation. The use of scalar mean (or unit vector) wind direction for the transport wind direction for straight-line Gaussian models is a recommendation and not a requirement. Therefore, TVA conforms to RG 1.23 (and by extension Section 5.3.1 of ANSI/ANS 3.11-2005) and the referenced section under SRP Section 2.3. However, TVA recognizes the aforementioned ANSI/ANS 3.11-2005 recommendation and is evaluating our use of vector wind computations versus scalar wind computation for wind direction. TVA will provide a voluntary submittal to the NRC describing the results of its evaluation within 30 days.
Please contact me if any additional information is required.
Thanks Ray From: Sutton, Mallecia [1]
Sent: Tuesday, February 13, 2018 4:31 PM To: Schiele, Raymond Joseph
Subject:
Clinch River: Met Question on Vector WD and Scalar WS TVA External Message. Please use caution when opening.
Ray, Please confirm TVAs commitments in SSAR Tables 1.9-1 and 1.9-2 to conform to RG 1.23 (and by extension Section 5.3.1 of ANSI/ANS 3.11-2005) and the referenced sections under SRP Section 2.3.
Background:
Site Safety Analysis Report (SSAR) Table 1.9-1 (Sheet 1 of 9) states that SSAR Sections 2.3.1 through 2.3.5 conform to Regulatory Guide (RG) 1.23 (Meteorological Monitoring Programs for Nuclear Power Plants). Further, SSAR Table 1.9-2 (Sheet 1 of 6) states that the application also conforms to corresponding Standard Review Plan (SRP) Sections 2.3.1 through 2.3.5.
2 SRP Section 2.3.3, Onsite Meteorological Measurements Program, Acceptance Criterion 1 (last paragraph) under Subsection II (Acceptance Criteria) states that [g]uidance on a suitable onsite meteorological monitoring program to provide the required meteorological data is presented in Regulatory Guide [RG] 1.23.
RG 1.23, Section B (Discussion), Paragraph 5, specifically references American National Standards Institute / American Nuclear Society (ANSI/ANS) 3.11-2005 (Determining Meteorological Information at Nuclear Facilities) with respect to best practices for onsite meteorological measurements programs at commercial nuclear power plants.
Section 5.3.1 of ANSI/ANS-3.11-2005 states that the transport wind direction for straight-line Gaussian models should be based on the scalar mean (or unit vector) wind direction.
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:
474 Mail Envelope Properties (0FA7144D673855418F1030CB8FBF3E612DF4D2DA)
Subject:
[External_Sender] FW: Clinch River: Met Question on Vector WD and Scalar WS Sent Date:
2/14/2018 4:11:35 PM Received Date:
2/14/2018 4:13:11 PM From:
Schiele, Raymond Joseph Created By:
rjschiele@tva.gov Recipients:
"Stout, Daniel Paul" <dpstout@tva.gov>
Tracking Status: None "Young, Michael Stephen Alexander" <msyoung@tva.gov>
Tracking Status: None "Montague, Kelvin Jevon" <kjmontague@tva.gov>
Tracking Status: None "Holcomb, John Michael" <jmholcomb@tva.gov>
Tracking Status: None "Sutton, Mallecia" <Mallecia.Sutton@nrc.gov>
Tracking Status: None Post Office:
TVACHAXCH8.main.tva.gov Files Size Date & Time MESSAGE 2957 2/14/2018 4:13:11 PM Options Priority:
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