NL-08-026, Energy Center Alert and Notification System Far Field Measurements Methodology
| ML080440270 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 02/07/2008 |
| From: | Dacimo F Entergy Nuclear Operations |
| To: | Feeney A Office of Nuclear Reactor Regulation, State of NY, Emergency Management Office |
| References | |
| NL-08-026 | |
| Download: ML080440270 (7) | |
Text
I-En tergy Indian Point Energy Center 450 Broadway, GSB P.O. Box 249 Buchanan, N.Y. 10511-0249 Tel (914) 734-6700 Fred Dacimo Vice President License Renewal February 7, 2008 Indian Point Unit Nos. 2 and 3 NL-08-026 Mr. Andrew Feeney First Deputy Director New York State Emergency Management Office 1220 Washington Avenue Public Security Building 22 Albany, New York 12226-2251
Subject:
Indian Point Energy Center Alert and Notification System Far Field Measurements Methodology Entergy letter, "Indian Point Energy Center Alert and Notification System Conclusions from November 9, 2007 Technical Review Meeting," Mr.John McCann to Ms. Rebecca Thomson, FEMA, dated January 18, 2008
Reference:
Dear Mr. Feeney:
Entergy Nuclear Operations, Inc. (Entergy) hereby submits for your review and comment the enclosed proposed Indian Point Energy Center (IPEC) Alert and Notification System Far Field Measurements Methodology.
This submittal is being provided in accordance with an action in the referenced letter to provide FEMA with a proposal for the analysis of far field measurements including techniques and data analysis methodology.
Entergy requests agreement by applicable stakeholders on the approach for far field measurements and data analysis.
Our plan is to contact FEMA shortly to meet on the Far Field Measurement technique and obtain their concurrence.
Should you have any questions regarding this matter, please contact Mr. Michael J.Slobodien, Director Emergency Planning, Entergy at (914) 272-3352.irs, F(ed R. Dacimo Vice President License Renewal Indian Point Energy Center A IZ NL-08-026 Page 2 of 2
Enclosure:
- 1. Indian Point Energy Center Alert and Notification System Far Field Measurements Methodology cc: Document Control Desk U.S. Nuclear Regulatory Commission Mail Stop O-P1-17 Washington, DC 20555-0001 Mr. Samuel J. Collins Regional Administrator Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406-1415 Resident Inspector's Office Indian Point Unit Nos. 2 and 3 U.S. Nuclear Regulatory Commission Mr. Robert Kahler Office of Nuclear Security and Incident Response Division of Preparedness and Response Licensing and Inspection Branch Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 Ms. Rebecca S. Thompson REP Branch Chief Federal Emergency Management Agency Region II 26 Federal, Plaza, 1 3 th Floor, Suite 1337 New York, NY 10278-0002 Mr. Stephen Kempf, Jr.Regional Administrator Federal Emergency Management Agency Region II 26 Federal Plaza'New York, NY 10278 Mr. Daniel Greeley Deputy Director Rockland County Fire and Emergency Services 35 Fireman's Memorial Drive Pomona, New York 10970 Mr. Anthony Sutton Commissioner Westchester County Department of Emergency Services 4 Dana Road Valhalla, New York 10595 Mr. Seamus Leary Deputy Commissioner Orange County Department of Emergency Services 225 Main Street Goshen, New York 10924 Mr. Adam Stiebeling Deputy Commissioner Putnam County Bureau of Emergency Services 112 Old Route 6 Carmel, New York 10512 NL-08-026 Enclosure 1 Page 1 of 1 Indian Point Energy Center Alert and Notification System Far Field Measurements Methodology BLUE RIDGE RESEARCH AND CONSULTING Far Field Measurements Methodology Indian Point Energy Center ATI Siren System February 7, 2008 The purpose of the measurements described herein is to characterize the amplitude of sound produced by the complete siren system around the Indian Point Energy Center.The results from these measurements will be compared with the results from the model developed by ATI to confirm the quality of the prediction reflected in the ATI model.Equipment ANSI certified Type 1 Sound Level Meters (SLMs) will be used in the measurements as per ANSI S12.18-1994.
Before and after each measurement the calibration of each sound level meter will be checked, and the calibration tone will be recorded for at least 30 seconds. Each sound level meter will be capable of recording noise data at one-second intervals.
The SLMs will be set to record the C-Weighted values. The 1 second Leq and the 1 second third octave band data will be recorded wherever possible based on equipment availability.
Each SLM microphone will be fitted with a wind screen and will be mounted on a tripod or other suitable firm mounting device at a height of approximately 5 feet above ground level. The SLM operator will synchronize the SLM and his time piece with the clock used to initiate the siren test. In addition, meteorological data will be collected including wind speed and direction, temperature and humidity within the EPZ.Measurement Locations Twenty (20) measurement locations will be selected within the EPZ. Locations of interest will include high population density areas and those locations previously identified with potentially lower projected sound levels, where additional sirens were added. Measurement locations will be identified at least three weeks prior to the test and provided to FEMA for its review. FEMA concurrence received one week prior to testing will enable training and logistics preparation for the test to proceed. Each measurement position should be approximately 50 feet from the nearest reflecting surface such as buildings, boulders, walls, and other obstacles.
The precise location of each measurement location with GPS coordinates will be determined and recorded, together with any additional details about the measurement location.General guidelines for selecting measurement locations are that the measurements should be roughly 1,000 feet or more from the nearest siren.I BLUE RIDGE RESEARCH AND CONSULTING Measurement Procedure The SLMs will start recording data approximately 2 minutes or more prior to the full system sounding and will continue to record data for at approximately 2 minutes or more after the siren sounding has concluded.
The "prior to" and "after" readings, provide a measure of the ambient conditions.
The testing personnel should be careful not to make any noise during the period while the SLM is running including the periods prior to and after siren sounding while the SLM is operating.
Each team operating an SLM will be given a data sheet (as shown in Figure 1) that will be filled out completely.
Each data sheet will have all of the information about the test including the date, time, location, SLM serial number, and calibration.
In addition, the team will record the local ambient noise level before and after the siren system sounding.
Each team will note on the data sheet any significant intruding noise sources that occur during the test. This is intermittent noise that is above background.
The team will record the source and time of the intrusion on the data sheet.Testing will not be conducted if meteorological conditions such as precipitation and elevatedwind conditions are not appropriate.
Disqualifying conditions are stated in ANSI S12.18-1994.
That determination should be made by the Test Director on the day of the test Data Analysis The data from the SLMs will be analyzed to determine the sound level produced during the full siren system activation.
The third-octave band with the majority of the siren energy will be identified and used for part of the analysis, including the difference above ambient. To avoid the problems of determining the precise start and stop times, the middle three minutes of the siren sounding will be used. From this portion of the data the following metrics should be determined:
- 3 minute C-Weighted Leq* Maximum 1 second C-Weighted Leq* 3 minute Leq in the third octave band with the majority of the siren energy** Maximum 1 second LEQ in the third octave band with the majority of the siren energy** L10, L50, and L90 for the C-Weighted data during the 3 minutes identified
- Li 0, L50, and L90 in the third octave band with the majority of the siren energy*during the,3 minutes identified
- Depending on equipment availability The 3 minute C-Weighted Leq will be used as the measurement for comparison with the ATI sound contour model prediction.
2 BLUE RIDGE RESEARCH AND CONSULTING Comparison with Model Predictions The measured metrics will be compared to the output from ATI's sound propagation model. The metric to be used for this analysis is the 3 minute Leq. Lmax will be reviewed for a more complete understanding of additional margin. For this analysis the Leq sound level predicted by the model will be compared with the measured sound pressure level at each location.
To evaluate the quality of the sound propagation model, the data will be analyzed by a bulk average deviation method as shown in Eq. 1 below.Any significant outlier will be identified and considered.
If there are extenuating circumstances that are identified and justify exclusion, these outliers will be removed from the bulk average calculation.
An outlier is defined as a measurement greater than 3 standard deviations of the difference in predicted and measured sound pressure level data. Any exclusion will be documented.(Eq. 1) 0 = _(P -Mi)N Where: Q is the measure of model quality Pi is the predicted Leq sound pressure level at the ith location Mi is the measured Leq sound pressure level at the ith location N is the total number of measurements A value for Q of positive 3 dBC or less is indicative of a high level of model quality.Since this is a one-sided test any negative value of Q is acceptable, since that means the measured values are predominately higher than the predicted and thus the model would be conservative.
3 BLUE RIDGE RESEARCH AND CONSULTING Figure 1 Indian Point Siren Test Sheet Time: SLM Serial Number: Date: SLM Model: Tester's Name: Measurement Location: GPS Coordinates:
West North v° .\,Plan Sketch of Site Show all structures within 300 feet Elevation Sketch of Site Location Drawing: Microphone height: ft. Temperature:
OF Checked Battery? Yes No Rel. Humidity:
%Checked Clock? Yes No Wind Speed: mph Taken Photo? Yes No Wind Direction:
Calibration level before test: dBC 30 second calibration tone recorded before test? Yes No Ambient noise level before test: dBC Maximum level observed during the test: dBC Calibration level after test: dBC 30 second calibration tone recorded after test? Yes No Ambient noise level after test: dBC Notes about test (including noise intrusions):
Tester's Signature:
4