ML21067A180
| ML21067A180 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 02/10/2021 |
| From: | ZionSolutions |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML21067A225 | List:
|
| References | |
| ZS-2021-0001 | |
| Download: ML21067A180 (2) | |
Text
DETAILS Division:
RP Name:
Small Piece of Concrete Above Background was Detected by ORISE
==
Description:==
On 12/03/19, while performing confirmatory surveys in survey unit (SU), 10209C ORISE HPs detected a concrete piece weighing 283 grams. The concrete piece was discovered approximately two inches below the ground surface. The initial survey with a 2350 instrument and a model 4410 gamma detector with a three-inch collimator. The reading was 38.3K CPM. The average background in the area was 2.9K CPM. A Telepole was used to determine dose rates and showed 0.1 mrRem/hr.
Start Date:
12/5/2019 6:36:00 PM End Date:
12/12/2019 12:00:00 AM Status:
Completed PROPERTIES SIG Level:
3 Date/Time Initiated:
12/5/2019 6:36:00 PM Brief
Description:
Small Piece of Concrete Above Background was Detected by ORISE
==
Description:==
On 12/03/19, while performing confirmatory surveys in survey unit (SU), 10209C ORISE HPs detected a concrete piece weighing 283 grams. The concrete piece was discovered approximately two inches below the ground surface. The initial survey with a 2350 instrument and a model 4410 gamma detector with a three-inch collimator. The reading was 38.3K CPM. The average background in the area was 2.9K CPM. A Telepole was used to determine dose rates and showed 0.1 mrRem/hr.
Immediate Actions:
The particle was captured and sent to chemistry. An isotopic analysis was performed with the following results: Co 60 2.69E+02 pCi/units, and Cs 137 1.21E+05S&LXQLWV
Recommended Actions:
Review for 10CFR50.75g The concrete was removed leaving no residual contamination and are considered remediated; therefore, does not meet the intent of 10CFR50.75g(1).
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Date Discovered:
12/3/2019 Issue Identified By:
NRC Related Documents:
Reviewed Date/Time:
12/5/2019 12:00:00 AM Maintenance Rule Applicable?
False Reportability Applicable?
False Operability Review Required?
False Page 1 of 2 ES-ZION-CR-2019-0176 Page 1 of 2 Condition Report
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Trends Cause Codes:
A7-B2-C01-Legacy contamination C02 Source unknown Event Codes:
$6LWH&ORVXUH)66VXUYH\\LVVXH CAQ/NONCAQ?
CAQ 50.75g Issue?
False 7230D Issue?
False MRC Review Meeting Date:
MRC Approval:
False MRC Comments:
Responsibilities Initator:
David S. Villicana Shift Manager:
Jason P. Pacheco-ext CR Owner:
Timothy W. Plutchak Events Step Person Start Date End Date Initiation:
David S. Villicana 12/5/2019 12/5/2019 OP Review:
Jason P. Pacheco-ext 12/5/2019 12/5/2019 Screening:
Timothy W. Plutchak 12/5/2019 12/12/2019 MRC Review:
Timothy W. Plutchak Pending CA Completion:
Timothy W. Plutchak 12/12/2019 12/12/2019 Verify and Closure:
Timothy W. Plutchak 12/12/2019 12/12/2019 Verification Verification:
Timothy W. Plutchak 12/12/2019 Verification Comments Close to actions taken as approved by MRC members on 12/12/19 meeting.
Page 2 of 2 ES-ZION-CR-2019-0176 Page 2 of 2 Condition Report
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