ML21067A190
| ML21067A190 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png (DPR-039, DPR-048) |
| Issue date: | 02/10/2021 |
| From: | ZionSolutions |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML21067A225 | List:
|
| References | |
| ZS-2021-0001 | |
| Download: ML21067A190 (4) | |
Text
ZION STATION RESTORATION PROJECT FOOTNOTES; PARTICLE INFORMATION FOOTNOTES; IDENTIFIED PARTICLES (1)
Survey Unit 10202B Discovered 03/30/19 Identified in Scan Rows 40 and 69 Scans indicated activity of 99,137 cpm and 9,573 cpm using 44-10 (11)
Survey Unit 10209C 11 Surface soil samples taken during investigaton First particle discovered during FSS L1-10202B-FIGS-001-SS showed 3.39E+02 pCi/g of Co-60 Identified during scan of row #55 Scan indicated small particle with activity of 17,000 cpm using 44-10 (2)
Survey Unit 10202D Discovered 03/28/19 Second particle identified during ORISE Confirmatory survey in January 2020 Identified in Scan Row 10 Not a particle but actually a small piece of contaminated concrete Scans indicated activity of 127,818 cpm using 44-10 3 Surface soil samples taken during investigaton No detectable ROC Concrete removed and post removal scans indicated no detectable ROC Particles captured and removed. Soil around particle was satisfactorily resurveyed (12)
Survey Unit 10209E (3)
Survey Unit 10203A Discovered 05/17/19 Discovered 2014 Identified during scan of row #83 Identified while performing RA in survey unit Scan indicated small particle with activity of 35,412 cpm using 44-10 Scans indicated 7 particles with highest activity of 15,000 cpm using 44-10 Particle captured and removed.
Particles captured and removed. Area completely remedated, soil disposed of as waste Surface and subsurface soil samples taken during investigaton Post remediation scans indicate no detectable ROC (4)
Survey Unit 10203F (13)
Survey Unit 10214E Discovered 06/09/15 Discovered March 2019 Identified while scanning survey unit after RAM incidents Identified while performing RA in parking lot Scans indicated several particles with highest activity of 539,000 cpm using 44-10 Scan indicated small particle with activity of 1.26 uCi Co-60 Particles captured and removed. Area completely remedated, soil disposed of as waste Particle captured and removed.
Post remediation scans indicated no detectable ROC Surface and subsurface soil samples taken during investigaton Post remediation scans and samples indicated no activity in excess of OpDCGL (5)
Survey Unit 10204D Discovered 11/12/19 (14)
Survey Unit 10214F Identified during scan of row #4 Discovered 11/10/19 Scans indicated a single particle with activity of 11,600 cpm using 44-10 Identified while performing RA in parking lot Particles captured and removed.
Scan indicated small particle with activity of 0.02 uCi Co-60 3 soil samples taken during investigaton, all less than MDC Particle captured and removed.
Post remediation scans indicated no detectable ROC Surface and subsurface soil samples taken during investigaton Post remediation scans and samples indicated no activity in excess of OpDCGL (6)
Survey Unit 10206D Discovered 11/04/19 (15)
Survey Unit 10220A Identified during scan of row #111 Two particles discovered, 1st during failed FSS as Class 2, 2nd during Class 1 FSS 1st particle discovered was 90,000 cpm and the 2nd in scan row #79 on 5/29/19 Both particles captured and removed.
Particles captured and removed.
Surface and subsurface soil samples taken during investigaton 2 soil samples taken during investigaton, all less than MDC Post remediation scans and samples indicated no activity in excess of OpDCGL Post remediation scans indicated no detectable ROC (16)
Survey Unit 10220I (7)
Survey Unit 10207A Contaminated debris identified by ORISE during confirmatory Discovered 10/18/19 Particle was identified as piece of asphalt Identified during scan of row #36 Gamma spec results indicte no plant-derived activity Scans indicated a single particle with activity of 30,000 cpm using 44-10 Particles captured and removed.
(17)
Survey Unit 10220G Also identified area of low level contamination >OpDCGL Discovered 06/02/18 Particle was was physically located in then Class 2 survey unit 10220B.
(8)
Survey Unit 10207B Discovered 08/28/19 Particle was captured and overburden soils disposed of as radioactive waste Identified during scan of row #32 Particles captured and removed.
(18)
Survey Unit 10221C Also identified area of low level contamination >OpDCGL Discovered 06/17/19 Identified in the scan row next to the railroad ballast Scan indicated small particle with activity of 7,000 cpm using 44-10 Particle captured and removed.
(9)
Survey Unit 10207C Surface and subsurface soil samples taken during investigaton Discovered 08/27/19 Post remediation scans and samples indicated no activity in excess of OpDCGL Identified during scans of rows #54 and 55 (19)
Survey Unit 12104 Discovered 06/09/15 Particles captured and removed.
One particle identified in survey unit during DHP remediation effort Surface and subsurface soil samples taken during investigaton Scan indicated small particle with activity of 400,000 cpm uisng 44-10 Cs-137 positively detected in post remediation samples at concentrations <OpDCGL Particle captured and removed.
Post remediation scans and samples indicated no activity in excess of OpDCGL (10) Survey Unit 10209A Discovered 08/01/19 Identified during scan of row #17 Scan indicated small particle with activity of 57,920 cpm using 44-10 Particle captured and removed.
Surface and subsurface soil samples taken during investigaton 7/25/2019 Soil satisfactorily resurveyed and post remediation scans and samples indicated no detectable ROC Scans indicated small particles with activitys of 5,000 cpm and 29,000 cpm respectively using 44-10 Particle was captured and removed. Post remediation samples indicated residual radioactivity <OpDCGL 283 grams, gamma spec indicates Co-60 at 2.69E+02 pCi/sample and Cs-37 at 1.21E+05 pCi/sample Cs-137 positively detected in post remediation samples at concentrations
<OpDCGL No activity inexcess of subsurface soil OpDCGL was detected prior to permission for backfill Particles captured and removed. Soil around particle was spot remediatied and resurveyed Scans indicated a single particle, 3 inches in the ground with activity of 45,000 cpm using 44-10 Soil satisfactorily resurveyed and post remediation scans and samples indicated no detectable ROC Scans indicated a single particle, 4 inches in the ground with activity of 45,000 cpm using 44-10 Soil satisfactorily resurveyed and post remediation scans and samples indicated no detectable ROC Class 2 survey unit 10220B reclassified as five Class 1 survey units. Location of particle discoverly was 10220G 50,000 cpm particle identified under an RA performed of an excavation Page 6 of 9
ZION STATION RESTORATION PROJECT FOOTNOTES; PARTICLE INFORMATION FOOTNOTES; IDENTIFIED PARTICLES FOOTNOTES; IDENTIFIED PARTICLES (20) Survey Unit 12106 (26)
Survey Unit 12201E Discovered 04/15/19 Discovered 6/9/2015 Two particles identified in survey unit during ORISE Conformatory survey Approximately 6 particles were identified in survey unit during DHP remediation eff Scan indicated highest particle activity of 140,000 cpm using 44-10 All particles were captured and removed.
Particles captured and removed.
Post remediation scans and samples indicated no activity in excess of OpDCGL Post remediation scans and samples indicated no activity in excess of OpDCGL (27)
Survey Unit 12202A (21) Survey Unit 12109 Discovered 6/9/2015 Discovered 7/15/2019 Approximately 2 particles were identified in survey unit during DHP remediation eff Five particles were identified in survey unit during DHP remediation effort Scans indicated particle activity of 70,000 cpm and 7,000 cpm using 44-10 Scan indicated highest particle activity of 350,000 cpm using 44-10 All particles were captured and removed.
Particles captured and removed.
Post remediation scans and samples indicated no activity in excess of OpDCGL Post remediation scans and samples indicated no activity in excess of OpDCGL (28)
Survey Unit 12202B (22) Survey Unit 12111 Discovered 6/9/2015 Discovered 06/09/15 Approximately 5 particles were identified in survey unit during DHP remediation eff Two particles were identified in survey unit during DHP remediation effort Scan indicated highest particle activity of 140,000 cpm using 44-10 Scan indicated highest particle activity of 100,000 cpm using 44-10 All particles were captured and removed.
Particles captured and removed.
Post remediation scans and samples indicated no activity in excess of OpDCGL Post remediation scans and samples indicated no activity in excess of OpDCGL (29)
Survey Unit 12202C (23) Survey Unit 12201B Discovered 6/9/2015 Discovered 6/9/2015 Approximately 3 particles were identified in survey unit during DHP remediation eff One particle was identified in survey unit during DHP remediation effort Scan indicated highest particle activity of 240,000 cpm using 44-10 Scan indicated particle activity of 539,000 cpm using 44-10 All particles were captured and removed.
Particle captured and removed.
Post remediation scans and samples indicated no activity in excess of OpDCGL Post remediation scans and samples indicated no activity in excess of OpDCGL (30)
Survey Unit 12202D (24) Survey Unit 12201C Discovered 6/9/2015 Discovered 6/9/2015 Approximately 3 particles were identified in survey unit during DHP remediation eff Approximately 22 particles were identified in survey unit during DHP remediation effort Scan indicated highest particle activity of 350,000 cpm using 44-10 Scan indicated highest particle activity of 575,000 cpm using 44-10 Single particle identified in survey unit during ORISE Conformatory survey Particle captured and removed.
Scans indicated small particle with activity of 38,000 cpm using 44-10 Post remediation scans and samples indicated no activity in excess of OpDCGL Discovered 7/15/2019 All particles were captured and removed.
(25) Survey Unit 12201D Post remediation scans and samples indicated no activity in excess of OpDCGL Discovered 6/9/2015 Approximately 12 particles were identified in survey unit during DHP remediation effort (31)
Survey Unit 12202F Scan indicated highest particle activity of 148,000 cpm using 44-10 Discovered 6/9/2015 Additional particle identified during FSS with activity of 15,717 cpm using a 44-10 Approximately 3 particles were identified in survey unit during DHP remediation eff All particles were captured and removed.
Scan indicated highest particle activity of 40,000 cpm using 44-10 Post remediation scans and samples indicated no activity in excess of OpDCGL All particles were captured and removed.
Post remediation scans and samples indicated no activity in excess of OpDCGL (32)
Survey Unit 12204A Discovered 12/5/2019 Single particle identified in survey unit during ORISE Conformatory survey Gamma analysis indicated small particle with Co-60 activity of 9.87 E+05 pCi/g Particle captured and removed.
Post remediation scans and samples indicated no activity in excess of OpDCGL Scans indicated small particle with activities of 600,000 cpm (1.74 uCi Co-60) and 100,000 cpm using 44-10 Page 7 of 9
ZION STATION RESTORATION PROJECT FOOTNOTES; PARTICLE INFORMATION Page 8 of 9
ZION STATION RESTORATION PROJECT FOOTNOTES; PARTICLE INFORMATION fort fort fort fort fort fort Page 9 of 9