NL-08-024, Letter 01/31/08, NL-08-024 Siren Design Report Section 14.1, Siren Signal Steadiness, Repeatability and Reproducibility
| ML080360511 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 01/31/2008 |
| From: | Dacimo F Entergy Nuclear Operations |
| To: | Feeney A Office of Nuclear Security and Incident Response, State of NY, Emergency Management Office |
| Kahler, Robert, NSIR, 301-415-2992 | |
| References | |
| NL-08-024 | |
| Download: ML080360511 (14) | |
Text
Indian Point Energy Center 450 Broadway, GSB P.O. Box 249 Buchanan, N.Y. 10511-0249 Tel (914) 734-6700 Fred Dacimo Vice President Operations January 31, 2008 Indian Point Unit Nos. 2 and 3 NL-08-024 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 Design Report
Reference:
Entergy letter, "New Indian Point Energy Center Alert and Notification System Installation, Testing and Implementation Schedule," Mr. Michael Balduzzi to Ms. Rebecca Thomson, FEMA, dated January 9, 2008
Dear Mr. Feeney:
Enclosed for your review is Section 14.1 of the Indian Point Energy Center (IPEC) Alert and Notification System Design Report. Section 14.1 of the Design Report discusses the concepts of siren signal steadiness, repeatability, and reproducibility. The section includes the results of testing performed in the anechoic chamber at the Georgia Technical Research Institute in Smyrna, Georgia. The testing demonstrated that the ATI sirens for use as the IPEC Alert and Notification System are steady, repeatable, and reproducible in accordance with FEMA guidance. Transmittal of this report is in accordance with the milestone schedule provided by the referenced letter.
Should you have any questions regarding this matter, please contact Mr. Michael J.
Slobodien, Director, Emergency Planning, Entergy at (914) 272-3352.
sin ely yours, Fred R. Dacimo Vice President Operations Indian Point Energy Center
NL-08-024 Page 2 of 2
Enclosure:
- 1. Indian Point Energy Center Alert and Notification System Design Report Final Section 14.1 cc:
Document Control Desk U.S. Nuclear Regulatory Commission Mail Stop O-Pl-17 Washington, DC 20555-0001 Mr. Samuel J. Collins Regional Administrator Region I Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406-1415 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 Ih 26 Federal Plaza, 13th 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. Adam Stiebeling Deputy Commissioner Putnam County Bureau of Emergency Services 112 Old Route 6 Carmel, New York 10512 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 Resident Inspector's Office Nuclear Regulatory Commission Indian Point Unit Nos. 2 and 3
NL-08-024 Page 1 of 1 Indian Point Energy Center Alert and Notification System Design Report Final Section 14.1
14 ACOUSTIC TESTING AND ANALYSIS 14.1 Steady, Repeatable, and Reproducible This section of the design report addresses the siren output characteristics of steadiness, repeatability, and reproducibility. Set forth below are the definition of each characteristic, how such characteristic was determined, and the documentation of test results. Georgia Tech Research Institute (GTRI) in Smyrna, Georgia established the testing methodology, conducted the testing, and provided the testing results which establish that the new Indian Point Alert and Notification System (ANS) sirens meet all applicable FEMA standards and guidancel.
Figure 14-1 shows the location of the nine (9) microphone cruciform array in relation to the siren speaker array inside the anechoic chamber. This equipment arrangement is consistent for all of the tests performed by GTRI in the anechoic chamber. The central microphone was aligned with the center of the siren speaker array and data from this microphone were used in test results and analyses.
Steadiness The definition of siren steadiness is the ability to maintain an alerting signal at a constant sound pressure level and signal frequency as a function of time. The standard for steadiness is + 2.0 dBC established by FEMA during the technical meeting held between ENOI and FEMA on November 9, 2007 and is based on the caption to Figure 1 in CPG 1-172,3.
The GTRI testing demonstrates that the siren output is steady in accordance with FEMA guidance in CPG 1-17 and as discussed below.
Siren time history curves depict sound pressure level (SPL) versus time. Siren time history curves for four omni-directional sirens are provided in figures 14 14-5. Each of the nine (9) time history curves associated with individual microphones follows the same pattern but at different sound pressure levels. Time history data recorded from the center microphone (#3) in the array for multiple activations are shown in figures 14-8 through 14-11. The center microphone was selected because it represents the on-axis center of the siren array location. Table 14-1 lists the range of siren sound variation for 28 independent speaker pair tests from four omni-directional sirens.
The GTRI data demonstrate that the omni-directional siren sound output during normal operation, which excludes an initial transient, varies between 0.16 and 0.49 dBC or 0.34 dBC on average over a 3-4 minute time period. Excluding the transient sound pressure level that occurs with signal initiation, the omni-directional sirens demonstrate a steady signal with sound pressure levels varying by less than 0.5 dBC over a 3-4 minute 1 Acoustic Testing of Prompt Alert Notification System Sirens from Indian Point Energy Center",
Volume 1 Chamber Testing, Georgia Tech Research Institute GTRI Report D5600-Volume 1, Wyle Laboratories Report WR-07-25, Volume 1 dated December 2007 2 CPG 1-17, Outdoor Warning Systems Guide, Federal Emergency Management Agency, March 1, 1980, page 10 3 Technical meeting between ENOI and FEMA and consultant, November 9, 2007'documented in ENOI letter January 9, 2008 14-1
sounding period. The initial transient sound pressure level reduction of approximately 1.0 dBC over the first 20-24 seconds of siren operation is due to the initial electrical burst from the siren amplifiers. The ANSI S12.14-19924 criteria allows for initial transients in accordance with paragraph 6.2.3.1 which states "Observations shall be made over a period of at least 30 seconds after the warning sound source has reached steady operation."
Results of the GTRI tests indicated that the bi-directional siren sound output, excluding the initial transient varied by less than 0.40 dBC over a 3-4 minute sounding period.
Figure 14-6 shows the data that demonstrate signal steadiness for the bi-directional siren system.
Based on the GTRI testing data, the steadiness range for both the omni-directional and bi-directional sirens is within 0.5 dBC over a 3-4 minute sounding period and meet the applicable FEMA standards and guidance.
Steady frequency output was measured for the siren activations of both omni-directional and bi-directional sirens at the standard operating frequency of 576 Hz as well as other frequencies including 660, 675, and 780 Hz. Frequency of the siren output was steady to within + 1.0 Hz over a 3-4 minute sounding period. Figure 14-7 shows the constancy of frequency during a representative siren sounding.
The independent GTRI testing results demonstrate that both the omni-directional and bi-directional sirens produce a steady alerting tone frequency in accordance with FEMA standards and guidance.
Repeatability The definition of repeatability is the ability of a siren to produce the same sound level output and tone frequency during multiple activations. The standard for repeatability is
+ 2.0 dBC established by FEMA during the technical meeting held between ENOI and FEMA on November 9, 2007 and is based on the caption to Figure 1 in CPG 1-17, page 3
103.
The GTRI testing demonstrates that the siren output is repeatable as discussed below.
Figures 14-8 through 14-11 show the representative test results of four different omni-directional sirens during several different activations. Data from the central microphone show sound pressure level variation ranging between 0.8 and 1.4 dBC. These data demonstrate that the omni-directional siren system is repeatable within a 1.4 dBC range over a 3-4 minute sounding period. Figure 14-6 shows that the bi-directional siren is repeatable within a 0.6 DBC range over a 3-4 minute sounding period.
In addition, in situ outdoor testing performed in the summer of 2007 within the Indian Point EPZ and shown in Figure 14-12 indicates very similar repeatability results for both the omni-directional and bi-directional sirens. The maximum in situ outdoor repeatability 4 American National Standards Institute (ANSI) S12.14-1992, "Methods for the fixed Measurement of the Sound Output of Audible Public Warning Devices installed at Fixed Locations Outdoors" 14-2
C range for 5 omni-directional siren tests was 1.1 dBC and for the two bi-directional siren tests was 0.3 dBC.
The independent GTRI testing results demonstrate that both the omni-directional and bi-directional sirens are repeatable in accordance with the FEMA standard established by the FEMA staff 3 Reproducibility Reproducibility is defined as the ability of a group of sirens to produce acoustic output that is consistent from one siren to another. The standard for reproducibility was established by the FEMA staff at a technical meeting between ENOI and FEMA on November 9, 2007 3.
The GTRI testing demonstrates that the siren output is reproducible as discussed below.
Reproducibility was demonstrated by comparing the sound pressure level output of different sirens. Figure 14-13 shows anechoic chamber results from twenty-eight (28) sound tests from four different omni-directional sirens with different speaker pairs facing the microphone array. The data demonstrate that the omni-directional siren systems are reproducible to within a + 2.0 dBC band. This is further demonstrated by outdoor tests results performed in situ within the Indian Point EPZ in the summer of 2007 and shown in Figure 14-14'5. Excluding one outlier (siren 213), outdoor in situtesting on the remaining 16 sirens measured on axis at 100 feet at siren height had a + 2.0 dBC band.
Anechoic chamber test results for siren 213 projected to 100 feet are well within the
+ 2.0 dBC range. Additionally, outdoor tests results obtained from siren 213 at GTRI were also within the + 2.0 dBC range. These results suggest that the outlying reading for siren 213 shown in Figure 14-14 was due to outdoor environmental effects.
Anechoic chamber and in situ outdoor tests described above demonstrate that the omni-directional sirens are reproducible.
Figure 14-6 shows the reproducibility of two bi-directional sirens to be within 1.0 dBC.
This reproducibility is further supported by in situ outdoor tests whose data are shown in Figure 14-12. The in situ outdoor reproducibility test between bi-directional sirens 116 and 120 using the worst case combination is 0.6 dBC. Therefore, the bi-directional sirens are reproducible to within a + 2.0 dBC band over a 3-4 minute sounding period.
The independent GTRI testing results demonstrate that both the omni-directional and bi-directional sirens are reproducible in accordance with the standard established by the FEMA staff 3 5 "General Acoustical Analysis of the New Indian Point Siren System - Final Report", August 2007, Blue Ridge Research and Consulting 14-3
Figure 14-1. Microphone Array in Anechoic Chamber Typical Steadiness of Siren Siren #331: 1T&IB Facing Mic Arrary: f= 576 Hz 140 139 138 137 136 135 134 1' 133 132 131
-; 130
,) 129 5.125 127 120 125 124 123 122 121 120 T1 YU 110 1w0 150 170 190 210 230 250 270 29D 310 330 350 Timo [seconas]
Figure 14-2. Time History of Each SPL for Each Microphone in the Array during the Sounding of Siren 331 f = 576 Hz (Source: GTRI Report D5600 - Vol. 1 Dated 12/07) 14-4
Typical Steadiness of Siren Siren #315: 4T&4B Facing Mic Arrary; f = 576 Hz R Mic*#
140.
139 138 137 136 135 134
- i 133 2 132 5 131 130 129
- o 128 127 126 125 124 123 122 121 120 0g 0
20 40 60 80 100 120 140 160 Time [seconds]
180 200 220 24AU 2bU Figure 14-3. Time History of Each SPL for Each Microphone in the Array during the Sounding of Siren 315 f = 576 Hz (Source: GTRI Report D5600 - Vol. 1 Dated 12/07)
Typical Steadiness of Siren Siren #213: 2T&2B Facing Mic Arrary; f = 576 Hz 140-139*
138-137-136 135-134 W 133 132 131 130 0 129 S 128-
- 45) 127-126-125.
124 123 122 121 1,1) 120 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 Time [seconds]
Figure 14-4. Time History of Each SPL for Each Microphone in the Array during the Sounding of Siren 213 f = 576 Hz (Source: GTRI Report D5600 - Vol. 1 Dated 12/07) 14-5
Typical Steadiness of Siren Siren #113; 1T&I8 Fackig Mic Arrary: f = 576 Hz 140 139 138 137 136 135 134
- 9 133 132 131 130 6
129 co M. 128 05 127 126 125 124 123 122 121 120 0
20 40 60 80 100 120 140 160 180 200 220 240 268
- 20.
JUo
,Lu
ýw Time [seconds]
Figure 14-5. Time History of Each SPL for Each Microphone in the Array during the Sounding of Siren 113 f = 576 Hz (Source: GTRI Report D5600 - Vol. 1 Dated 12/07)
BI-Directional Sirens Microphone #3 Franaencv = 576 Hz 0.
0 6
-la-93 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 A24 123 122 121 120 0
20 40 60 80 100 120 140 I b 18Uv Time [seconds]
200 220 240 260 Figure 14-6. Steady, Repeatable, and Reproducible Results from Bi-Directional Sirens (Source: GTRI Report D5600 - Vol. 1 Dated 12/07) 14-6
R U,
n NUmbe r' r M"op in SPL'Over 1Sou~nd DuýPpation,n (AdB)i rto04O 0.37 rto045 0.49 rto046 0.35 rto047 0.26 rto063 0.32 rto064 0.43 rto065 0.26 rto069 0.36 rto07O 0.42 rto071 0.35 rto074 0.27 rto075 0.35 rto155 0.32 rtol57 0.34 rtol58 0.34 rtol59 0.31 rtol65 0.24 rtol66 0.30 rtol69 0.32 rtol70 0.35 rtol71 0.39 rtol72 0.38 rtol97 0.23 rtol98 0.16 rtol99 0.34 rto200 0.39 rto201 0.37 rto202 0.48 Min 0.16 Max 0.49 Avg.
0.34 Table 14-1. Steadiness of Omni-Directional Siren System Measured at the Center Microphone Location (#3)
(Source: GTRI Report D5600 - Vol. 1 Dated 12/07) k 14-8
I Exml of Sie FrqecVaato f 576 Hz uPt Nil I'I?
'I62 TIM 1a Oh-;FY 19 Figure 14-7. Contour Map of Frequency and Time Domain of a Typical Siren Sounding (Source: GTRI Report D5600 - Vol. 1 Dated 12/07)
Siren #331 Level Variation Microphone #3 Frequency = 576 Hz 136.
- J125
-Rn-cd Q1~
134 133 132 Q" 131 130
- .129 71
- 128
(*127
-Run rto040; 10116W0 "o126
-Run rtco45; 10116W0 125 f
Run rtoO46; 10116D07
-. Run r W47 : 10/ 11S M7 (n124 Run Mt063; 10117D07 23 Run rtWG4: 10/17W0 123
"-Run rto0GS: 10MV17/*
122-t21 t201-U V
U 4U bU OU IUI 1A) 14U It, 1CU LU)
Time [seconds]
2L'J d4U tu)
Figure 14-8. Repeatability of Acoustic Measurements on Siren #331; Microphone #3 Data (Run 46 Sounding Started After Start of Data Collection)
(Source: GTRI Report D5600 - Vol. 1 Dated 12/07) 14-9
Siren #113 Level Variation Microphone #3 Freouanov = 576 Hz U) 0.
N Co 136 135 134 133 132 131 130 129 128 127 126 125 124 12%
122 121 120 0
20 40 60 80 100 120 140 18D 180 200 220 240 260 Time Iseconds]
Figure 14-9. Repeatability of Acoustic Measurements on Siren #113; Microphone #3 Data (Source: GTRI Report D5600 - Vol. 1 Dated 12/07)
Siren #315 Level Variation Microphone #3 Fromeinnv = ;76 i1z 0.w 0.
"U CL C-CO, 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 0
20 40 60 80 100 120 140 160 180 Time [seconds]
20D 220 240 260 Figure 14-10. Repeatability of Acoustic Measurements on Siren #315; Microphone #3 Data (Source: GTRI Report D5600 - Vol. 1 Dated 12/07) 14-10
Siren #213 Level Variation Microphone #3 Freauencv = 57G Hz 136 136 134 133
, 132 P"131
- o130, S129 S128 o"127"
, 126,
-J 125, 124
- 122, 1 21,
- 120, Figure 0
20 40 60 s0 100 120 140 160 180 200 220 240 260 Time [seconds]
14-11. Repeatability of Acoustic Measurements on Siren #213; Microphone #3 Data (Source: GTRI Report D5600 - Vol. 1 Dated 12/07)
Siren O
Repet.
ili dBC Siren #
1st Test 2nd Test 3rd Test 4th Test Range Omni Sirens 102 113.9 114.1 0.2 213 111.3 111.6 111.1 110.9 0.7 369 114.1 113.3 0.8 329 113.6 112.6 1
336 114.3 113.8 113.2 1.1 Bi-Directional Sirens 116 116.1 1
115.9 0.2 120 115.5 1
115.8 j
0.3 Note: all measurements in dBC on axis MýEnkmry Figure 14-12. Outdoor Siren Repeatability Test Results from 2007 (Source: BRRC Final Report Dated 8/07) 14-11
Speaker Pair Repeatability Omni Sirens; Microphone #3 Standard Deviation = 0.9 dBC 0.
04 00 Lo.
a.
U, 140 138 136 134 132 130 128 126 124 122 120 118 116 114 112 110.
0 2
4 6
8 10 12 14 16 18 20 22 24 26 28 30 Figure 14-13. Reproducibility of Omni-Directional Sirens Tested in Anechoic Chamber in 2007 (Source: GTRI Report D5600 - Vol. 1 Dated 12/07)
Sie to Sie Outpu inn 121 0nSueol#
dBC 215 114.2 220 1135 241 1137 102 1140 113 (Omni 2) 1153 103 1147 226 1139 403 1134 413 1144 312 1139 369 1137 339 1152 329 1131 347 1142 331 (Omnil) 1140 336 1138 213 (Omni 3) 1114 ill 105 0
5 10 15 20 When measured at elevated height on axis at 100 feet outdoors Figure 14-14. Outdoor Siren Reproducibility Test Results from 2007 (Source: BRRC Final Report Dated 8/07) 14-12