2011-03-23 – NRC – Fukushima Daiichi – DOE Consequence Management Field Team – HPGe Data Sets

2011-03-23-nrc-fukushima-daiichi-doe-consequence-management-field-team-hpge-data-sets

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From:
Sent:
To:
Subject:
OST02 HOC
Wednesday, March 23, 2011 5:02 PM
Hoc, PMT12; PMT11 Hoc; PMT02 Hoc; PMT01 Hoc
FW: HPGe Data sets
Attachments: Triage Report- TE-11-0721 Final (OUO).pdf; Triage Report- TE-11-0721 Final
(OUO).docx
-Original MessageFrom:
HOO Hoc
Sent: Wednesday, March 23, 20114:58 PM
To: LIA07 Hoc; OSTOl HOC; OST02 HOC; OST03 HOC
Subject: FW: HPGe Data sets
–Original Message—From:
Sheron, Brian
Sent: Wednesday, March 23, 20114:57 PM
To: HOO Hoc
Subject: FW: HPGe Data sets
Please pass on the ET, RST, and PMT Directors. Thanks.
—Original Message—–
From: Aoki, Steven [mailto:[email protected].doe.gov]
Sent: Wednesday, March 23, 20114:38 PM
To: Pitts, William Karl; Bowyer, Theodore W; [email protected]; Brinkman, Bill; Hurlbut, Brandon; Sheron, Brian; McFarlane,
Harold; Adams, lan; Kelly, John E (NE); Grossenbacher, John (INL); Owens, Missy; Per Peterson; Finck, Phillip; Dick
Garwin; Bob Budnitz; Rolando Szilard; Aoki, Steven; Koonin, Steven; Steve Fetter; Binkley, Steve; Richard L Garwin
Cc: NITOPS; Adams, lan
Subject: HPGe Data sets
FYI -just to make sure you are seeing the data.
1
DB 407 of696
Date(s):
Event Type:
Location:
Submitted by:
Triage Web:
Contact(s):
Responder(s):
Report Date:
22 Mar 2011
Actual
Japan
OFFICIAL USE ONLY
DISTRIBUTION LIMITED TO NNSA/NA-40
Triage Event: TE-11-0721
DOE Consequence Management Field Team
TE-11-0721
A. Aragon (Triage FTL); R. Spa nard (Triage FTL)
J. Bounds (LANL), W. Casson (LANL), S. Myers (LANL), N. Wimer (LLNL)
22 Mar 2011
List of data files used in the analysis.
2011_03_21_12_ 49_350.spc 2011_03_21_13_25_360.spc 2011_03_21_13_58_ 490.spc
2011_03_21_14_29_090.spc 2011_03_21_15_01_510.spc 2011_03_21_15_35_350.spc
2011_03_22_22_17 290 BKGD.spc
Summary
These ORTEC Detective-EX HPGe spectra were provided by the DOE Field Monitoring Teams in Japan.
Triage analysts were asked to examine these spectra for characterization of reactor damage.
As with other spectra analyzed to date, Triage analysis shows coolant release nuclides only; anticipated
since the data was collected at a distance from the reactor site. There were no features in these spectra
that would indicate core melting.
Analysis
The spectra are of good quality and well suited for comprehensive nuclide identification; they were
collected in uniform fashion across a range of distances from the plant (along three distinct highways).
With the understanding the spectra reflected ground deposition of unknown distribution, nuclide
identification and relative activities can be reported, while absolute activities cannot.
The spectra were consistent with the suite of radionuclides that had been observed earlier this week.
The radionuclides observed are indicative a coolant release only, expected for spectra taken at a
distance from the Fukushima plant. No refractory nuclides, indicators of core release, were observed in
any of these spectra; spectra from the grounds of the plant would be more definitive. The nuclides
present in the spectrum are here listed:
Major Radionuclides
1-131
1-132
Te-132
1-133
Cs-134
Cs-136
Cs-137
Minor Radionuclides
Te-129
Te-129m
La-140
1
DB 408 of 696
OFFICIAL USE ONLY
DISTRIBUTION LIMITED TO NNSA/NA-40
No other radionuclides were evident in the spectra. The nuclides Mo-99, Zr-95, and Nd-147, all high
melting point species and indicators of core melting, were specifically sought and not observed. The
spectrum plot below shows the spectrum analyzed, along with a modeled fit which used attenuation
through air to fit the full spectrum.
Cai.PCF,33-!
Energy (keV)
llve·lime(s) = 580 >I
chr·sc;uare = 2~ ~5
1 &o~~-2~oo~~~-6,a_o,_s~oo~1~oo_o~1-2~oo~~~,7~o~o~~2~2~oo~~2~7o~o~
03
c
~ 1tr
.s::::. u
C/) c 111
:l
0 u
1cf
• j.j : .. •\ • • • •
Channel Number
I.: …
• i311
[I
Figure 1. Screen dump of GADRAS fit to one of the spectra for TE-11-0721. All peaks were identified as
being from the nuclides listed above. Attenuation through air was used to perform full spectrum
fitting.
Ratios may provide some additional information. All spectra were analyzed assuming a Detective EX and
a one meter detection distance. However, since the source is distributed over a wide area and is not a
point source, absolute activity calculations are not being attempted. Instead, we report the ratios of
activities which should be consistent for similar situations. Table 1 shows average values of relative
activities. If 1-131 has an activity of 1 (arbitrary units), the other detected nuclides had approximate
activities in the proportions as given. Ground spectra taken at various times can be compared in this
fashion to observe variations in deposition composition and the effect of the various halflives.
2
DB 409 of696
OFFICIAL USE ONLY
DISTRIBUTION LIMITED TO NNSA/NA-40
Table 1. Relative activities of radionuclides evident in TE-11-0721.
Latitude 37.29076 37.442435
Longtitude 140.61472 140.52471
2011_03_2 2011_03_
2_18_14_1 22_17_35
Filename 20.spc 500.spc
mR/h 0.090 0.148
Ban- Ban-
Highway Etsu Etsu
Exit2 Exit 3
Distance 40km 45km
129Te
129mTe
1311 1.000 1.000
132Te 0.272 0.300
1321 0.269 0.299
1331 0.003 0.002
134Cs 0.145 0.201
136Cs 0.025 0.030
137Cs 0.134 0.177
140La 0.007 0.008
Comments on distributions:
Relative
1-131
3.5
3
2.5
2
1.5
1
0.5
0
0


20
37.590206 36.797261 36.903004
140.41986 140.72635 140.75162
2011_03_ 2011_03_ 2011_03_
22 16 43 21 15 35 21_15_01
51o.s”Pc 3SO.s”Pc 510.spc
0.605 0.329 0.696
Tohuku Joban Joban
Exit 20 Exit 14 Exit 15
58km 74km 62km
0.246 0.474
0.139 0.320
1.000 1.000 1.000
0.516 0.283 0.715
0.387 0.442 0.741
0.000 0.008 O.D13
0.301 0.034 0.041
0.043 0.006 0.006
0.240 0.034 0.044
0.010 0.000 0.001
• •
• •

• • •
40 60
km from Fukushima
37.001973 37.067582
140.81259 140.83824
2011_03_ 2011_03_
21 14 29 21_13_58
OSO.spc 490.spc
0.98 0.446
Joban Joban
Exit 16 Exit 17
50km 42km
0.420 0.343
0.241 0.211
1.000 1.000
0.573 0.220
0.762 0.577
0.013 0.015
0.028 0.020
0.004 0.004
0.034 0.024
0.001 0.001
mR/h
3.5
3
2.5
2
1.5
• 1
• 0.5
0
80
37.124803
140.94779
2011_03_
21 13 25
36o.sP<: 0.56 Joban Exit 18 33km 0.130 0.101 1.000 0.194 0.268 0.005 0.023 0.003 0.022 0.001 Figure 2. Dose rates and 1-131 relative activity versus distance SSW of Fukushima on Joban Expressway. The other Table 1 data sites represent different directions and are not included here. 3 DB 410 of 696 37.235578 140.98569 2011_03_ 21 12 49 3SO.spc 3.0 Joban Exit 19 20km 0.160 0.100 1.000 0.092 0.257 0.007 0.018 0.005 0.020 0.001 OFFICIAL USE ONLY DISTRIBUTION LIMITED TO NNSA/NA-40 Figure 3. Map of data locations Figure 3 shows the locations where the data was taken, relative to the Fukushima nuclear plant. Note that exit 20, exits 2 and 3, and exits 14 through 19 are from three different highways. Figure 2 shows the variation of dose rates and iodine intensities on the Joban Expressway SSW of the plant, Exits 14 through 19. Note that the radiation does not fall off linearly with distance, rather it is affected by the local winds and weather patterns. Recommendations for follow up activities: Definitive determination of whether core releases have occurred is expected to require HPGe assays from grounds of the plant itself. A spectrum of the quality that was submitted for this report, but taken from an air filter from the Fukushima Daiichi site, would provide the best data for determination of the status of core damage via gamma spectroscopy. 4 DB 411 of 696 Date(s): Event Type: Location: Submitted by: Triage Web: Contact(s): Responder(s): Report Date: 22 Mar 2011 Actual Japan -ofFICIAL USE ONL't' DISTRIBUTION UMITED TO NNSA/NA-40 Triage Event: TE-11-0721 DOE Consequence Management Field Team TE-11-0721 A. Aragon (Triage FTL); R. Spanard (Triage FTL) J. Bounds (LANL), W. Casson (LANL), S. Myers (LANL), N. Wimer (LLNL) 22 Mar 2011 List of data files used in the analysis. 2011_03_21_12_ 49_350.spc 2011_03_21_13_25_360.spc 2011_03_21_13_58_ 490.spc 2011_03_21_14_29_090.spc 2011_03_21_15_01_510.spc 2011_03_21_15_35_350.spc 2011_03_22_22_17 290 BKGD.spc Summary These ORTEC Detective-EX HPGe spectra were provided by the DOE Field Monitoring Teams in Japan. Triage analysts were asked to examine these spectra for characterization of reactor damage. As with other spectra analyzed to date, Triage analysis shows coolant release nuclides only; anticipated since the data was collected at a distance from the reactor site. There were no features in these spectra that would indicate core melting. Analysis The spectra are of good quality and well suited for comprehensive nuclide identification; they were collected in uniform fashion across a range of distances from the plant (along three distinct highways). With the understanding the spectra reflected ground deposition of unknown distribution, nuclide identification and relative activities can be reported, while absolute activities cannot. The spectra were consistent with the suite of radionuclides that had been observed earlier this week. The radionuclides observed are indicative a coolant release only, expected for spectra taken at a distance from the Fukushima plant. No refractory nuclides, indicators of core release, were observed in any of these spectra; spectra from the grounds of the plant would be more definitive. The nuclides present in the spectrum are here listed: Major Radionuclides 1-131 1-132 Te-132 1-133 Cs-134 Cs-136 Cs-137 Minor Radionuclides Te-129 Te-129m La-140 1 DB 412 of 696 OFFICIAL USE ONbY DISTRIBUTION LIMITED TO NNSA/NA-40 No other radionuclides were evident in the spectra. The nuclides Mo-99, Zr-95, and Nd-147, all high melting point species and indicators of core melting, were specifically sought and not observed. The spectrum plot below shows the spectrum analyzed, along with a modeled fit which used attenuation through air to fit the full spectrum. Cal.PCF,33- ! Energy (keV) lrve·time(sl = 58() SJ tho SGUJI·~ - 2~ ~5 lif~~·--~/~OO~--JC~·0~~60~0~8~00~1~C~00~1/~0C~~--1~70~0--~/~/~00~--/~7~00~ Hf" Q) c:: c ro 1cf .c. .0.._ ~ 1o3 c ;::, 0 0 1rl 10' . ·; .. •• Channel Number •. :.1· • ··:11 Figure 1. Screen dump of GADRAS fit to one of the spectra for TE-11-0721. All peaks were identified as being from the nuclides listed above. Attenuation through air was used to perform full spectrum fitting. Ratios may provide some additional information. All spectra were analyzed assuming a Detective EX and a one meter detection distance. However, since the source is distributed over a wide area and is not a point source, absolute activity calculations are not being attempted. Instead, we report the ratios of activities which should be consistent for similar situations. Table 1 shows average values of relative activities. If 1-131 has an activity of 1 (arbitrary units}, the other detected nuclides had approximate activities in the proportions as given. Ground spectra taken at various times can be compared in this fashion to observe variations in deposition composition and the effect of the various halflives. 2 DB 413 of 696 OFFICIAL USE ONLY DISTRIBUTION LIMITED TO NNSA/NA-40 Table 1. Relative activities of radionuclides evident in TE-11-0721. Latitude 37.29076 37.442435 37.590206 Longtitude 140.61472 140.52471 140.41986 2011_03_2 2011_03_ 2011 03 2 18 14 1 22 17 35 22 16 43 Filename io.sp{; - 500.Six: 510.spc mR/h 0.090 0.148 0.605 Ban- Ban- Highway Etsu Etsu Tohuku Exit2 Exit 3 Exit 20 Distance 40km 45km 58km 129Te 129mTe 1311 1.000 1.000 1.000 132Te 0.272 0.300 0.516 1321 0.269 0.299 0.387 1331 0.003 0.002 0.000 134Cs 0.145 0.201 0.301 136Cs 0.025 0.030 0.043 137Cs 0.134 0.177 0.240 140La 0.007 0.008 0.010 Comments on distributions: Relative 1-131 3.5 3 2.5 2 1.5 1 0.5 0 0 <> •
<>

20
36.797261 36.903004
140.72635 140.75162
2011_03_ 2011_03_
21 15 35 21 15 01
3SO.spc 510.spc
0.329 0.696
Joban Joban
Exit 14 Exit 15
74km 62km
0.246 0.474
0.139 0.320
1.000 1.000
0.283 0.715
0.442 0.741
0.008 0.013
0.034 0.041
0.006 0.006
0.034 0.044
0.000 0.001
<>
<> <>
• • •
40 60
km from Fukushima
37.001973 37.067582
140.81259 140.83824
2011_03_ 2011_03_
21_14_29 21 13 58
090.spc 490.spc
0.98 0.446
Joban Joban
Exit 16 Exit 17 ·
50km 42km
0.420 0.343
0.241 0.211
1.000 1.000
0.573 0.220
0.762 0.577
0.013 0.015
0.028 0.020
0.004 0.004
0.034 0.024
0.001 0.001
mR/h
3.5
3
2.5
2
1.5
<> 1
• 0.5
0
80
37.124803
140.94779
2011_03_
21 13 25
3SO.spc
0.56
Joban
Exit 18
33km
0.130
0.101
1.000
0.194
0.268
0.005
0.023
0.003
0.022
0.001
Figure 2. Dose rates and 1-131 relative activity versus distance SSW of Fukushima on Joban
Expressway. The other Table 1 data sites represent different directions and are not included here.
3
DB 414 of696
37.235578
140.98569
2011_03_
21 12 49
3SO.spc
3.0
Joban
Exit 19
20km
0.160
0.100
1.000
0.092
0.257
0.007
0.018
0.005
0.020
0.001
OFFICIAL USE ONLY
DISTRIBUTION LIMITED TO NNSA/NA-40
Figure 3. Map of data locations
Figure 3 shows the locations where the data was taken, relative to the Fukushima nuclear plant. Note
that exit 20, exits 2 and 3, and exits 14 through 19 are from three different highways. Figure 2 shows the
variation of dose rates and iodine intensities on the Joban Expressway SSW of the plant, Exits 14 through
19. Note that the radiation does not fall off linearly with distance, rather it is affected by the local winds
and weather patterns.
Recommendations for follow up activities:
Definitive determination of whether core releases have occurred is expected to require HPGe assays
from grounds of the plant itself. A spectrum of the quality that was submitted for this report, but taken
from an air filter from the Fukushima Daiichi site, would provide the best data for determination of the
status of core damage via gamma spectroscopy.
4
DB 415 of 696