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| | number = ML092870679 | | | number = ML092870679 |
| | issue date = 10/13/2009 | | | issue date = 10/13/2009 |
| | title = 2009/10/13-Exhibit P - EPA Aermod: Latest Features and Evaluation Results | | | title = Exhibit P - EPA Aermod: Latest Features and Evaluation Results |
| | author name = | | | author name = |
| | author affiliation = US Environmental Protection Agency (EPA) | | | author affiliation = US Environmental Protection Agency (EPA) |
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| AERMOD and ISC-PRIME had a similar evaluation outcolne for the full-year Bowline Point database, featuring buoyant steam electric plant releases, with no significant differences in model performance. The 3-hour Q-Q plot is shown in Figure 8, and the 24-hour Q-Q plot is shown in Figure 9. For each averaging time, both models exhibit a modest overprediction tendency. | | AERMOD and ISC-PRIME had a similar evaluation outcolne for the full-year Bowline Point database, featuring buoyant steam electric plant releases, with no significant differences in model performance. The 3-hour Q-Q plot is shown in Figure 8, and the 24-hour Q-Q plot is shown in Figure 9. For each averaging time, both models exhibit a modest overprediction tendency. |
| Figure 8. Q-Q Plot for Bowline Point 3-Hour Averages (SO*) | | Figure 8. Q-Q Plot for Bowline Point 3-Hour Averages (SO*) |
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| Bowline 3-hr Q-Q Plot (xlQ) 87m Stack 1 10 100 1000 Obs. Conc. (vglrn3) | | Bowline 3-hr Q-Q Plot (xlQ) 87m Stack 1 10 100 1000 Obs. Conc. (vglrn3) |
| Figure 9. Q-Q Plot for Bowline Point 24-Hour Averages (SOz) | | Figure 9. Q-Q Plot for Bowline Point 24-Hour Averages (SOz) |
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Category:Legal-Exhibit
MONTHYEARML15337A3522015-11-17017 November 2015 Official Exhibit - NYS000582-00-BD01 - Diagram of Strength Vs Amplitude by Dr. Richard T. Lahey ML15337A3372015-11-11011 November 2015 Official Exhibit - ENTR00726-00-BD01 - Track 2 Hearing Exhibit List ML15337A3322015-11-0505 November 2015 Official Exhibit - ENT000726-00-BD01 - Entergy Track 2 Hearing Exhibit List ML15337A3352015-11-0505 November 2015 Official Exhibit - RIVR14001-00-BD01 - Riverkeeper Tailored Track 2 Exhibit List ML15337A3362015-11-0505 November 2015 Official Exhibit - NRCR10001-00-BD01 - NRC Staff Track 2 Exhibit List ML15337A3332015-11-0404 November 2015 Official Exhibit - NYSR25001-00-BD01 - NYS Revised Tailored Exhibits List Relevant to Track 2 Contentions ML15337A3312015-11-0303 November 2015 Official Exhibit - NRC000230-00-BD01 - Corrections to Prefiled Testimony NRC000168 and NRC000197 ML15337A3262015-10-29029 October 2015 Official Exhibit - ENT000722-00-BD01 - Supplemental Testimony of Entergy Witnesses Nelson Azevedo, Timothy Griesbach & Randy Lott ML15337A3292015-10-29029 October 2015 Official Exhibit - ENTR16001-00-BD01 - Entergy Revised Exhibit List ML15337A3242015-09-23023 September 2015 Official Exhibit - NYS000576-00-BD01 - Pre-Filed Supplemental Testimony of Richard T. Lahey Re Contentions NYS-25, NYS-26B/RK-TC-1B & NYS-38/RK-TC-5 ML15337A3072015-09-0909 September 2015 Official Exhibit - NYS000573-PUB-00-BD01 - Supplemental Reply Statement of Position of the State of New York and Riverkeeper, Inc. in Support of Contention NYS-38/RK-TC-5 (Public, Redacted) (September 9, 2015) ML15337A2962015-09-0909 September 2015 Official Exhibit - NYS000570-PUB-00-BD01 - Supplemental Reply Statement of Position of the State of New York and Riverkeeper, Inc. in Support of Contention NYS-26B/RK-TC-1B (Public, Redacted) (September 9, 2015) ML15337A2832015-09-0909 September 2015 Official Exhibit - NYS000563-00-BD01 - Pressurized Water Reactor (PWR) Systems, USNRC Technical Training Center, Reactor Concepts Manual, Pages 4-1 to 4-28 ML15337A2952015-09-0909 September 2015 Official Exhibit - NYS000569-PUB-00-BD01 - Pre-filed Supplemental Reply Testimony of Richard T. 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Duquette in Support of Contention NYS-38/RK-TC-5 (Public, Redacted) (September 9, 2015) ML15337A2972015-09-0909 September 2015 Official Exhibit - RIV000164-00-BD01 - NUREG-1740, ACRS, Voltage-Based Alternative Repair Criteria: a Report to the Advisory Committee on Reactor Safeguards by the Ad Hoc Subcommittee on a Differing Professional Opinion (2001) ML15337A3062015-09-0909 September 2015 Official Exhibit - NYS000572-PUB-00-BD01 - Pre-filed Supplemental Reply Testimony of Richard T. Lahey, Jr. in Support of Contention NYS-38/RK-TC-5 (Public, Redacted) (September 9, 2015) ML15337A2822015-09-0909 September 2015 Official Exhibit - NYS000566-00-BD01 - Figure 1 for Supplemental Reply Testimony of Dr. Richard T. Lahey ML15337A3142015-09-0404 September 2015 Official Exhibit - ENTR00615-PUB-00-BD01 - Entergy'S Statement of Position Re Contention NYS-25 (Embrittlement) - Redacted ML15334A2842015-08-10010 August 2015 Official Exhibit - ENT000687-00-BD01 - NRC, Safety Evaluation Report, Topical Report on ASME Section III Piping and Component Fatigue Analysis Utilizing the Westems Computer Code (WCAP-17577, Revision 2) (Undated) ML15335A2932015-08-10010 August 2015 Official Exhibit - NRCR00104-00-BD01 - on Yee Statement of Professional Qualifications (Revised) ML15337A2642015-08-10010 August 2015 Official Exhibit - NRC000196-PUB-00-BD01 - NRC Staff'S Initial Statement of Position on Contention NYS-25 (Reactor Vessel Internals) ML15337A3192015-08-10010 August 2015 Official Exhibit - ENT000698-PUB-00-BD01 - Entergy'S Revised Statement of Position Regarding Contention NYS-38/RK-TC-5(Safety Commitments) (Aug. 10, 2015)Redacted ML15337A3202015-08-10010 August 2015 Official Exhibit - ENT000699-PUB-00-BD01 - Redacted Revised Testimony of Entergy Witnesses Nelson Azevedo, Robert Dolansky, Alan Cox, Jack Strosnider, Timothy Griesbach, Barry Gordon, Randy Lott, and Mark Gray Regarding Contention NYS-38/RK ML15337A3172015-08-10010 August 2015 Official Exhibit - ENT000678-PUB-00-BD01 - NL-07-140, Letter from F. Dacimo, Entergy, to NRC Document Control Desk, ?Reply to Request for Additional Information Regarding License Renewal Application? (Nov. 28, 2007)Redacted ML15337A2652015-08-10010 August 2015 Official Exhibit - NRC000197-PUB-00-BD01 - NRC Staff Testimony of Dr. Allen Hiser, Jeffrey Poehler, and Gary Stevens on NYS-25 and NYS-38/RK-TC-5 ML15337A2412015-08-10010 August 2015 Official Exhibit - NRCR00147-00-BD01 - NRC Staff'S Revised Statement of Position on State of New York and Riverkeeper'S Joint Contention NYS-38/RK-TC5 (Revised) ML15335A2902015-08-10010 August 2015 Official Exhibit - NRC000222-00-BD01 - IP3 FSAR Rev. 04 Chapter 3 (2011) (Excerpt) ML15334A2632015-08-10010 August 2015 Official Exhibit - ENT000648-00-BD01 - M. Mitchell, Chief, Vessels and Internals Integrity Branch, Response to Non-Concurrence Regarding Safety Evaluation for Topical Report MRP-227 Pressurized Water Reactor Internals Inspection and Evaluat ML15337A2622015-08-10010 August 2015 Official Exhibit - NRC000228-00-BD01 - Indian Point Unit 2 Technical Specifications 3.1.4 ML15337A2452015-08-10010 August 2015 Official Exhibit - NRC000227-00-BD01 - Gary Stevens Statement of Professional Qualifications ML15337A2632015-08-10010 August 2015 Official Exhibit - NRC000229-00-BD01 - Indian Point, Unit 3 Technical Specifications 3.1.4 ML15335A2192015-08-10010 August 2015 Official Exhibit - ENTR00031-00-BD01 - Curriculum Vitae of Alan B. Cox ML15335A2112015-08-10010 August 2015 Official Exhibit - ENTR20186-00-BD01 - Curriculum Vitae of Mark A. Gray ML15337A3162015-08-10010 August 2015 Official Exhibit - ENT000616-PUB-00-BD01 - Testimony of Entergy Witnesses Nelson F. Azevedo, Robert J. Dolansky, Alan B. Cox, Jack R. Strosnider, Timothy J. Griesbach, Randy G. Lott, and Mark A. Gray Regarding Contention NYS-25 (Embrittleme ML15337A2782015-08-10010 August 2015 Official Exhibit - NRC000168-PUB-00-BD01 - NRC Staff Testimony of Dr. Allen Hiser, Dr. Ching Ng, Mr. Gary Stevens, P.E., and Mr. on Yee, Concerning Contentions NYS-26B/RK-TC-1B and NYS-38/RK-TC-5 ML15337A2712015-08-10010 August 2015 Official Exhibit - NRC000223-00-BD01 - IP3 FSAR Rev. 04 Chapter 14 (2011) ML15337A2592015-08-10010 August 2015 Official Exhibit - NRC000224-00-BD01 - IP3 FSAR Rev. 04 Chapter 16 ML15337A2442015-08-10010 August 2015 Official Exhibit - NRCR00161-00-BD01 - NRC Staff Testimony of Dr. Allen L. Hiser and Mr. Kenneth J. Karwoski Concerning Portions of State of New York and Riverkeeper, Inc. Joint Contention NYS-38/RK-TC5 (Revised) ML15334A2822015-08-10010 August 2015 Official Exhibit - ENT000680-00-BD01 - Curriculum Vitae of Barry M. Gordon ML15335A2912015-08-10010 August 2015 Official Exhibit - NRCR00118-00-BD01 - Indian Point Unit 3 Technical Specifications (Excerpt) (Revised) ML15334A2282015-08-10010 August 2015 Official Exhibit - ENT000634-00-BD01 - Entergy, IP2, FSAR Update, Revision 25 (2014) (Excerpts) ML15335A2822015-08-10010 August 2015 Official Exhibit - NRC000220-00-BD01 - Pressurized Water Reactor Owners Group (PWROG) Presentation Slides, Industry and NRC Coordination Meeting Materials Programs Technical Exchange: Clevis Insert Bolt Update, (June 2014) ML15337A2692015-08-10010 August 2015 Official Exhibit - NRC000169-00-BD01 - NRC000169 - Indian Point, Unit 2 Technical Specifications (Excerpt) ML15337A2602015-08-10010 August 2015 Official Exhibit - NRC000226-00-BD01 - Jeffrey C. Poehler Statement of Professional Qualifications ML15335A2732015-08-10010 August 2015 Official Exhibit - NRC000183-00-BD01 - NRC Inspection Manual, Inspection Procedure 71013, Site Inspection for Plants with a Timely Renewal Application (Sept. 25, 2013) ML15335A2202015-08-10010 August 2015 Official Exhibit - ENTR00184-00-BD01 - Curriculum Vitae of Jack R. Strosnider ML15335A3012015-08-10010 August 2015 Official Exhibit - NRC000206-00-BD01 - Indian Point, Unit 2, Updated Final Safety Analysis Report (Ufsar), Rev. 25, Chapter 14 - Safety Analysis (2014) 2015-09-09
[Table view] |
Text
Indian Point Nuclear genera tin^ Units 2 and 3 Docket Nos. 50-247/ 50-2864 R NRC Staff's Response in Opposition to State of New York's Motion for Partial Summary Disposition of NYS Contention 16116A Exhibit P
AERMOD:
Latest Features and Evaluation Results.
ABSTRACT AERMOD is an advanced plume model that incorporates updated treatments of the boundary layer theory, understanding of turbulence and dispersion, and includes handling of terrain interactions. The model was formally proposed by EPA in April 2000 as a replacement for the ISCST3 model. Several model enhancements were made as a result of public comment, including the installation of the PRIME downwash algorithm. The latest verslon of the model, version 02222, has been placed on EPA's web site for beta test purposes. This paper reviews the latest features and updated evaluation results for AERMOD version 02222.
The overall model evaluation results for AERMOD version 02222 with nondownwashing databases can be summarized as follows, taking one composite (geometric mean) ratio of predicted to observed RHC value for short-term averages at each site, and also taking the annual average ratio at sites with year-long databases:
1.03 is the overall predicted-to-observed ratio for short-term averages (with a range among sites from 0.76 to 1.35).
0.73 is the overall predicted-to-observed ratio for annual averages (with a range among sites from 0.30 to 1.64).
While the predicted-to-observed ratios did not vary substantially for AERMOD between simple and complex terrain sites, there was a large change in the average ratio for ISCST3 : 0.96 for simple terrain and 6.4 for conlplex terrain.
MODEL EVALUATION RESULTS FOR DOWNWASH DATABASES A developnlental evaluation of the AERMOD model with PRIME added was conducted on four developmental databases prior to its application to four independent databases. ~aine." describes these databases and others that were originally considered for the EPRI PRIME evaluation study.
The developmental databases (described below) included one half of the days selected at random from a full year of data for the Bowline power plant database located on the Hudson River near Haverstraw, New York, the Millstone power plant located on the Connecticut coast, the Duane Arnold Energy Center (DAEC) located in eastern Iowa, and the Alaska 1Vorth Slope field study near Prudhoe Bay, Alaska. The Bowline Point database was used in both the developnlental and evaluation evaluations because it was the only full year database, and more complete development testing of both ISC-PRIME and AERMOD version 02222 required the use of half of this database.
The main purpose of testing with the developmental databases was to assure that the AERMOD predictions were consistent with the ISC-PRIME predictions for stack-receptor combinations dominated by building downwash. However, as noted earlier, one correction was made to AERMOD to adjust the threshold trajectory angle of the rising plume that determines whether the plume will escape the effects of the building. As noted below, the evaluation results for the developmental databases included both underpredictions and overpredictions for both AERMOD and ISC-PRIME. However, no attempt was made in the develop~nentalphase of testing to further adjust the downwash algorithm.
Developmental Evaluation (Downwash)
The Bowline Point slte", located in the Hudson River valley in New York State, is shown in Figure 1 (topographic map). The electric utility site included two 600-MW units, each with an 86.9-111 stack and a dominant roof tier with a height of 65.2 m high in a nual area. There were four nlonitoring sites as shown in Figure 1 that ranged from about 250 to 850 m from the stacks.
Hourly emissions data was determined from load data, coal analyses, and site-specific relationships between loads and fuel consumption. Meteorological data was obtained from a
AERMOD and ISC-PRIME had a similar evaluation outcolne for the full-year Bowline Point database, featuring buoyant steam electric plant releases, with no significant differences in model performance. The 3-hour Q-Q plot is shown in Figure 8, and the 24-hour Q-Q plot is shown in Figure 9. For each averaging time, both models exhibit a modest overprediction tendency.
Figure 8. Q-Q Plot for Bowline Point 3-Hour Averages (SO*)
Bowline 3-hr Q-Q Plot (xlQ) 87m Stack 1 10 100 1000 Obs. Conc. (vglrn3)
Figure 9. Q-Q Plot for Bowline Point 24-Hour Averages (SOz)
Bowline 24-hr Q-Q Plot (xIQ) 87m Stack -
10 100 Obs. Conc. (pglm3)
Both models also had a similar evaluation outcome for two non-buoyant release heights (with two different tracer gases) at the Millstone Nuclear Power Plant. Figure 10 shows that both models overpredict by close to a factor of 2 for the 29-m Freon releases, but underpredict by about a factor of 2 for the 46-m SF6 releases (see Figure 1 1).
Figure 10. Q-Q Plot for Millstone 1 -Hour Averages for 29-m Releases (Freon)
Millstone Freon l-hr Q-Q Plot (xIQ) - 29m Stack 10
~ b sConc.
. (pslm3)
Figure 11. Q-Q Plot for Millstone 1-Hour Averages for 46-m Releases (SF6)
Millstone SF, l-hr Q-Q Plot (xIQ) - 48m Stack 100 10 Obs. C o n c . (pslm3)
The Duane Arnold Energy Center also featured similar evaluation outcomes for AERMOD and ISC-PRIME for the non-buoyant releases. Figure 12 shows a 1 - n ~release Q-Q plot, in which both models generally underpredict, but AERMOD has less of an underprediction tendency.
Both models underpredict for the 24-m releases (see Q-Q plot in Figure 13), with AERMOD showing a larger underprediction tendency except for the highest concentrations. The Q-Q plot in Figure 14 shows both models with peak concentrations that are nearly unbiased for the 46-m releases.
Figure 12. Q-Qt for DAEC 1 -Hour Averages for 1-m Releases (SFs)
DAEC SF, 1-hr Q-Q Plot (xIQ) - 1m Stack 10 100 Obs. Conc. (pslrn3)
Figure 13. Q-Q Plot for DAEC 1-Hour Averages for 24-m Releases (SFG)
DAEC SF, 1-hr Q-Q Plot (xIQ) 24m Stack -
10 100 Obs. Conc. (pslrn3)