From:
Peter Tam To:
Arias, Jesus; Loeffler, Rick; Salamon, Gabor Date:
07/11/2006 10:25:32 AM
Subject:
Monticello; Draft RAI on Meterology for Full-Scope AST Application ( TAC
MC8971)
Jay, Rick:
Our reviewer for meterology has developed the following draft RAI questions. Can you discuss these with us in the conference call (about radiological consequences) today? Or would you like to schedule a difference call?
1.
Section 4, Atmospheric Dispersion, of the March 7, 2006 NRC Regulatory Issue Summary 2006-04 (RIS 2006-04), Experience with Implementation of Alternative Source Terms, states that valid wind direction data in the ARCON96 format should range from 1E to
360E. Fields of nines (e.g., 999) should be used to indicate invalid or missing data. The staff notes that the Monticello hourly meteorological data for the 1998-2002 period generally contains fields of nines to indicate invalid data, but also has some zeros in the wind direction and wind speed fields. Are these data (i.e., the zeros) valid data? RIS 2006-04 further states that the jfds used as input to the PAVAN computer code should have a large number of wind speed categories at the lower wind speeds in order to produce the best results (e.g., Section
4.6 of NUREG/CR-2858, PAVAN: An Atmospheric Dispersion Program for Evaluating Design Basis Accidental Releases of Radioactive Materials from Nuclear Power Stations, suggests wind speed categories of calm, 0.5, 0.75,1.0, 1.25,1.5, 2.0, 3.0, 4.0, 5.0, 6.0, 8.0 and 10.0
meters per second). What is the wind speed and designation for calm (e.g., less than 0.5 meters per second based upon instrument thresholds)? The staff is attempting to generate a jfd using these categories and is attempting to input valid data only.
2.
What wind speed values were used as an input to Midas to define the categories in the Monticello wind speed, wind direction and atmospheric stability joint frequency distributions (jfds) for both the Regulatory Guide 1.21 and non-Regulatory Guide 1.21 tables? For example, if two consecutive categories are defined as 4-7 miles per hour (mph) and 8-12 mph, what is the value defining the lower category (e.g., 7 mph, 7.5 mph, 8 mph)?
3.
Please provide the calculations for the atmospheric dispersion factors (/Q values) used in the Monticello alternative source term license amendment request for new /Q values. Also, provide a site plan generally drawn to scale and showing true North, with postulated release/receptor pairs highlighted.
4.
Which /Q values were used to model unfiltered inleakage into the control room?
5.
Do the accident scenarios and generated /Q values model the limiting doses considering multiple release scenarios (e.g., including those due loss of offsite power or other single failure)?
6.
When assessing meteorological factors that may affect secondary containment drawdown capability, is high wind speed, only, the limiting case (e.g., temperature is not a factor)?
This e-mail is intended solely to prepare you and others for the proposed conference call. It does not formally convey an NRC staff position, and it does not formally request for additional information.
Peter S. Tam, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
e-mail: pst@nrc.gov Tel.: 301-415-1451 CC:
Brown, Leta; Forrest, Edwin; Hart, Michelle; Kotzalas, Margie; Tammara, Seshagiri Mail Envelope Properties
(44B3B4DC.A3C : 12 : 35330)
Subject:
Monticello; Draft RAI on Meterology for Full-Scope AST Application (
TAC MC8971)
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| list | | | | Topic |
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| RIS 2006-02, Good Practices for Licensee Performance During the Emergency Preparedness Component of Force-On-Force Exercises | 23 February 2006 | Backfit | | RIS 2006-02, Good Practices For Licensee Performance During The Emergency Preparedness Component of Force-On-Force Exercises | 23 February 2006 | Backfit | | RIS 2006-03, Guidance on Requesting an Exemption from Biennial Emergency Preparedness Exercise Requirements | 24 February 2006 | Exemption Request
Backfit | | RIS 2006-04, Draft RAI on Meteorology for Full-Scope AST Application | 11 July 2006 | Loss of Offsite Power | | RIS 2006-05, Withdrawal of Transportation Safeguards Advisories SA-01-01 Rev 1 and SA-03-02 | 20 April 2006 | Enforcement Discretion
RAMQC
Fire Protection Program
Backfit | | RIS 2006-06, New Reactor Standardization Expectations Needed to Support the Design-Centered Licensing Review Approach | 31 May 2006 | Backfit
Pre-application | | RIS 2006-07, Proposed Changes to the Safety System Unavailability Performance Indicators | 12 June 2006 | Enforcement Discretion
Significance Determination Process
Backfit | | RIS 2006-08, Publicly Available Cover Letters for Security-Related Inspection Reports | 12 June 2006 | Significance Determination Process
Backfit | | RIS 2006-08, Publicly Available Cover Letters For Security-Related Inspection Reports | 12 June 2006 | | | RIS 2006-09, NRCs Procedures for Review of Decommissioning Funding Assurance Reports | 21 June 2006 | Backfit | | RIS 2006-09, Nrc'S Procedures For Review of Decommissioning Funding Assurance Reports | 21 June 2006 | | | RIS 2006-10, NRC Regulatory Issue Summary NRC Regulatory Issue Summary 2006-010 - Regulatory Expectations with Appendix R Paragraph Iii.G.2 Operator Manual Actions | 30 June 2006 | Hot Short
Safe Shutdown
Fire Barrier
Enforcement Discretion
Operator Manual Action
Exemption Request
Fire Protection Program
Manual Operator Action | | RIS 2006-10, NRC Regulatory Issue Summary NRC Regulatory Issue Summary 2006-010 - Regulatory Expectations with Appendix R Paragraph III.G.2 Operator Manual Actions | 30 June 2006 | Hot Short
Safe Shutdown
Fire Barrier
Enforcement Discretion
Operator Manual Action
Exemption Request
Fire Protection Program
Backfit
Manual Operator Action | | RIS 2006-11, Requesting Quality Assurance Program Approval Renewals Online by Electronic Information Exchange | 20 July 2006 | | | RIS 2006-12, Endorsing NEI White Paper, Enhancements to Emergency Preparedness Programs for Hostile Action | 19 July 2006 | Safeguards Contingency Plan
Backfit | | RIS 2006-12, Us Nuclear Regulatory Commission. NRC Regulatory Issue Summary 2006-12; Endorsement of Nuclear Energy Institute Guidance Enhancements to Emergency Preparedness Programs for Hostile Action | 19 July 2006 | Safe Shutdown
Safeguards Contingency Plan
Backfit | | RIS 2006-13, Information on the Changes Made to the Reactor Oversight Process to More Fully Address Safety Culture | 31 July 2006 | Fitness for Duty
Backfit | | RIS 2006-13, NRC000046-NRC Regulatory Issue Summary 2006-13, Information on the Changes Made to the Reactor Oversight Process to More Fully Address Safety Culture | 31 July 2006 | Fitness for Duty
Temporary Modification
Backfit | | RIS 2006-13, 2006/07/31-Intervenor-Exhibit 10-Information On The Changes Made To The Reactor Oversight Process To More Fully Address Safety Culture, Regulatory Issue Summary 2006-13, U.S. NRC | 31 July 2006 | Fitness for Duty
Backfit | | RIS 2006-14, NRC Regulatory Issue Summary - Enforcement Requirements for Facility Changes Under 10 CFR 70.72 (c) (2) | 22 September 2006 | Enforcement Discretion
Backfit | | RIS 2006-14, NRC Regulatory Issue Summary - Enforcement Requirements for Facility Changes Under 10 CFR 70.72 (C) (2) | 22 September 2006 | Enforcement Discretion
Backfit | | RIS 2006-15, Withdrawn NRC Regulatory Issue Summary 2006-15 Preparation and Scheduling of Operator Licensing Examinations | 14 August 2006 | Generic Fundamentals Examination
Backfit | | RIS 2006-16, Transfer of Management Oversight of Region I Licensees to Region IV | 15 August 2006 | Backfit | | RIS 2006-17, NRC Staff Position on the Requirements of 10 CFR 50.36, Technical Specification, with Respect to Limiting Safety System Settings (LSSS) During Periodic Testing and Calibration of Instrument Channels | 24 August 2006 | Functionality Assessment
Operability Determination
Backfit | | RIS 2006-18, WITS200500191/WITS200500192/WITS2005193 - NRC Regulatory Issue Summary 2006-18 Requesting Exemption from the Public Dose Limits for Certain Caregivers of Hospital Patients | 31 August 2006 | Enforcement Discretion
Exemption Request | | RIS 2006-18, Wits200500191/Wits200500192/Wits2005193 - NRC Regulatory Issue Summary 2006-18 Requesting Exemption From the Public Dose Limits for Certain Caregivers of Hospital Patients | 31 August 2006 | Exemption Request | | RIS 2006-19, Availability of Guidance on Radioactive Seed Localization | 14 September 2006 | Backfit | | RIS 2006-20, Enclosure 2 - List of Recently Issued Generic Communication | 14 September 2006 | | | RIS 2006-21, Improving Response Capabilities Through the Use of an Incident Response Electronic Library | 28 September 2006 | Reactor Vessel Water Level
Severe Accident Management Guideline
Backfit
Siren | | RIS 2006-22, Lessons Learned from Recent 10 CFR Part 72 Dry Cask Storage Campaign | 15 November 2006 | Safe Shutdown
Enforcement Discretion
Exemption Request
Control of Heavy Loads
Fuel cladding
Backfit | | RIS 2006-23, Post-Tornado Operability of Ventilating and Air-Conditioning (Vac) Systems Housed in Emergency Diesel Generator (EDG) Rooms | 6 December 2006 | Earthquake
Backfit | | RIS 2006-23, Post-Tornado Operability of Ventilating and Air-Conditioning (VAC) Systems Housed in Emergency Diesel Generator (EDG) Rooms | 6 December 2006 | | | RIS 2006-24, Revised Review and Transmittal Process for Accident Sequence Precursor Analyses | 6 December 2006 | Significance Determination Process
Loss of Offsite Power
Backfit | | RIS 2006-25, Requirements for the Distribution and Possession of Tritium Exit Signs and the Requirements in 10 CFR 31.5 Ad 32.51a | 7 December 2006 | Tritium Exit Sign | | RIS 2006-25, Requirements For the Distribution and Possession of Tritium Exit Signs and the Requirements in 10 CFR 31.5 Ad 32.51A | 7 December 2006 | Tritium Exit Sign
Exit Sign | | RIS 2006-26, Training and Experience and Grandfather Provisions for Authorized Medical Physicists Under 10 CFR 35 | 7 December 2006 | Enforcement Discretion | | RIS 2006-26, SECY-06-0248 Enclosure 2 - Regulatory Issue Summary 2006-26, Training and Experience and Grandfather Provisions for Authorized Medical Physicists Under 10 CFR Part 35 | 7 December 2006 | | | RIS 2006-27, Availability of NRC 313A Series of Forms and Guidance for Their Completion | 27 June 2007 | Brachytherapy
TheraSphere |
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