ML040150581
ML040150581 | |
Person / Time | |
---|---|
Site: | Columbia ![]() |
Issue date: | 01/14/2004 |
From: | Energy Northwest |
To: | Office of Nuclear Reactor Regulation |
References | |
Download: ML040150581 (27) | |
Text
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Alternative Source Terml IF License Amendment Pre-submittal Meeting January 14, 2004 ENERGY People Vision Solutions
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F I - I". -- FIT [ \ F-... ( --- [ I-- 1-- - - 1-- --f Introduction Engineering Management: Mike Humphreys Robin Feuerbacher Licensing Management: Doug Coleman Project Team Personnel: Abbas Mostala Tim Powell Mike Brandon Contractor Support: Jim Metcalf ENERGY 2 w NORTHWEST People Vision Solutions
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.. AST... Agenda AST Submittal Purpose
- Scope of Technical Specifications Changes
- SGT JCO Resolution
- Draw Down Analysis
- Meteorological Data
- Control Room Inleakage
- Dose Analyses and Differences
- AST Submittal Schedule
- Accuracy and Completeness
- Staff Review Topics ENERGY 3 (PeopleNORTHWEST Vision Solutions
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AST Submittal Purpose Mike Brandon
- Revision to Technical Specifications and Bases to reflect AST methodology (Reg Guide 1.183)
- De-activation of Main Steam Leakage Control (MSLC) system
- Resolution of standby gas treatment/secondary containment draw down analysis
- Resolution of control room envelope in-leakage/dose
- Increase allowed Main Steam Isolation Valve (MSIV) leakage
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Scope of TS Changes Mike Brandon I
I I-I; TS SECTION CHANGE Definitions Revised DOSE EQUIVALENT I-131 LCO 3.1.7 SLC and Added MODE 3 Table 3.3.6.1-1 Table 3.3.6.2-1, Deleted "during CORE ALTERATIONS" LCO 3.6.4.1, .2 & .3 and added "recently" SR 3.6.1.3.10 Revised secondary bypass leakage from
< 0.74 scfh to 0.04%[volume]/day TS 3.6.1.8 MSLC Deleted in its entirety
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1__ I to [.-- 1-~ f 1 1- Io^ ri r- i - F-'- L--- T V-Scope of TS Changes 1.
Mike Brandon TS SECTION CHANGE SR 3.6.4.1.1 Replaced > 0.25 inch vacuum wg with > 0 SR 3.6.4.1.4 Deleted this 24 month surveillance to draw down in < 120 seconds SR 3.6.4.3.3 Added new requirement to verify SGT reaches > 5000 cfm in < 2 minutes TS 5.5.7 VFTP Revised SGT System flowrate for filter testing range from "4012 to 4902" to "4500 to 5500" cfm
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f -. -- l.o 1 - r-- v>-- rem i', v- rm r- r- v-SGTJCO Resolution A
Mike Brandon
- JCO for nonconformance with 120 second draw down time assumed in Licensing Basis X AST License Amendment will resolve this Jco and establish the new Licensing Basis w The information necessary for staff review and approval will be provided in the AST submittal
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Draw Down Analysis
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- GOTHIC 7.1 computer code
- Reactor Building (RB) Model
- Model will use 3 nodes
- ECCS pump room (basement elevation)
- Refueling floor (top floor)
- Remainder of building (RB middle section)
ENERGY NORTHWEST People Vision Solutions
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- Requirements of SRP 6.2.3
- Certified 5 %/ 95 % meteorological data
- Sensitivity analyses being performed a QA database for inputs/assumptions approved by Energy Northwest ENERGY 9 NORTHWEST People Vision Solutions
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Meteoro ogical Data Robin Feuerbacher Recent plant meteorological data
- Expert meteorological vendor Measurement units clearly identified
- Meteorological data scrubbed for completeness and accuracy by vendor and Energy Northwest
- Two separate databases maintained by vendor and Energy Northwest for final verification
- Reasonableness checks performed with vendor and NRC codes ENERGY People Vision* Solutions
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Meteorological Data
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w Joint Frequency Distributions compared with PNNL on-site data at lower elevation
- Four years of recent meteorological data verified for AST (1996-99)
- Less than five years of data allowed per RG 1.194 n By RG 1.183, meteorological data collected per FSAR
- Wind speed classes in guidance per RG 1.111 m ENERGY NORTHWEST People*Vision*Solutions
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Meteorological Data Robin Feuerbacher I Data recovery (%)
1996 1997 1998 1999 Lower elevation* 88.3 91.1 93.7 87.9 90.2 Upper elevation* 86.0 90.9 94.2 85.3 89.1
- Composite of delta temperature, wind speed, and wind direction available simultaneously
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Robin Feuerbacher
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. 7 I F-11 1I Tracer Gas Test completed November 2003 Used ASTM E741 Methodology per RG 1.197 Measured Unfiltered Inleakage (under review)
Single Train results: 7 scfm Dual Train results: 27 scfm Unfiltered Inleakage input into AST analyses Single Train: 40* + 10 (ingress/egress) cfm Dual Train: 65* + 10 (ingress/egress) cfm
- Uncertainty not included per RG 1.197 if < 100 cfm n ENERGY 13 NORTHWEST.
People *Vision
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AST Dose Analyses Robin Feuerbacher
- STARDOSE computer code for record of analyses RADTRAD for checking purposes by analyst and another independent contractor
- QA database for inputs/assumptions approved by Energy Northwest
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, - I r: r-V. (. I. rvn tn F- re-r- r- I_,_ I v,17 r V Dose Analyses - LOCA Robin Feuerbacher
- Current Core Inventory Source Term
- Main Steam Leakage Control System not credited
- Drywell spray removal credited per SRP model
- Suppression pool pH control credited for Standby Liquid Control injection
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r--Ad ~~~ o . r a---. r- -- - - - r7- F r---- V V -- r_., . F Dose Analyses - LOCA (cont.)
Robin Feuerbacher Releases assumed as ground level Containment leakage of 0.50%/day Secondary containment bypass leakage of 0.04%/day
- 46 scfh MSIV leakage, evenly distributed over 4 lines (may increase pending dose sensitivity analyses and adequate margin to limits)
- Factor of two reduction in leakages at 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />
- Control Room Emergency Filtration auto-initiated both trains, 1 train manually secured at 30 minutes, no credit for securing one remote intake
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Differencesfrom
-Previous Submittal- LOCA
- Revised Control Room (CR) make-up air flows (1300 cfm dual / 800 cfm single train)
- Reduced unfiltered inleakage (75 cfm dual / 50 cfm single CREF train including CR ingress/egress)
- Revised ARCON96 and PAVAN atmospheric dispersion factors (X/Qs) for 1996-99 data
- 20-minute Reactor Building draw down, no mixing credit
- Dose Conversion Factors based FGR 11 & 12 default data in RADTRAD
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Dose Analyses - MSLB Robin Feuerbacher
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- Activity for release based on Technical Specifications Dose Equivalent Iodine limits
- MSIV closure time of 6 seconds (>Tech Spec limit)
-Control Room Emergency Filtration (CREF) not credited
- Direct ground release to environment - no Turbine Building holdup
- Maximum makeup flow for normal CR ventilation (1100 cfm), no filter credit ENERGY 18 PNORTHWEST People Vision Solutions
1-:-F r~-~i---- -- An 7 r[ r-- - r----- r, r- r - F-Differencesfrom Previous Submittal- MESLB Direct application of Dose Equivalent 1-131 ifl_ "Control Room X/Qs based on RG 1.194 "puff" release model (no steam buoyancy considered)
Off-site X/Qs based on 1996-99 data
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r--- r--- r r r-- ( - -- --- r-- - - -- [---- I-Dose Analyses - CRDA Robin Feuerbacher Fuel damage equals 1.79% of the core
- Fuel melting occurs in 0.0138% of the core
- Release fractions of 100% noble gas and 50%
iodine from melted fuel and fraction of core inventory in the fuel gap
- RG 1.183 leakage fractions from steam lines and main condenser
- No credit for CREF filters
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Differencesfrom i1 I.-
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Previous Submittal - CRDA
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- Revised CR make-up air flows (same as LOCA analysis)
- Reduced CR unfiltered inleakage (same as LOCA analysis)
- Revised X/Qs for 1996-99 data (same as LOCA analysis)
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Dose Analyses - FIIA Robin Feuerbacher
- Standby Gas Treatment and Secondary Containment not credited for FHA
- 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> fuel decay prior to accident Release to the environment occurs over 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> period
- Fuel damage is 0.528% of the core ENERGY 22 @ NORTHWEST People Vision Solutions
r-- - r r-. r r--- F---r-r-r r---- r- r--- i-- r--- r~- F- F - ( -- F. ( _ I Differencesfrom Previous Submittal - FHA
- Revised CR make-up air flows (same as LOCA analysis)
Reduced CR unfiltered inleakage (same as LOCA analysis)
Revised X/Qs for 1996-99 meteorological data (same as LOCA analysis)
CREF filter efficiency of 95% for gaseous iodine, 99%
for particulate removal (same as LOCA analysis)
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AST Submittal Schedule Robin Feuerbacher Ii:~,
Activit Date Meteorological data verified 11/20/03 - complete Control room tracer gas tests 11/10/03 - complete Atmospheric dispersion factors 12/31/03 - complete Dose analyses 2/13/04 Secondary cont. draw down analyses 2/28/04 CNSRB review and approval 4/14/04 NRC submittal 4/30/04 S ENERGY 24 w NORTHWEST People Vision Solutions
r.--- [-a -- r--- r- -- r---- -- r--- r--- r- F_ I- -- F__ 1..--. F__ I Accuracy and Completeness Doug Coleman GENERIC ACTIONS
- Engineering Reorganization Creation of Design Authority Positions Implementation of the Engineering Electronic Database
- Quest for Excellence plan m ENERGY 25 WNORTHWEST People -Vision
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Accuracy and Completeness Mike Brandon SPECIFIC ACTIONS B Line-by-line review Rigorous certification
- Independent reviews by external experts
- Independent review by Energy Northwest QA ENERGY 26 NORTHWEST People Vision
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Staff Review. Topics Doug Coleman Anticipated review period
-Coordination of RAIs
- NRC review team
- Emerging issues
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