ML21067A180

CR-2019-0176, Small Piece of Concrete Above Background Was Detected by Orise

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: ML21067A176 ML21067A177 ML21067A178 ML21067A179 ML21067A180 ML21067A181 ML21067A182 ML21067A183 ML21067A184 ML21067A185 ML21067A186 ML21067A187 ML21067A188 ML21067A189 ML21067A190 ML21067A191 ML21067A192 ML21067A193 ML21067A195 ML21067A196 ML21067A197 ML21067A198 ML21067A199 ML21067A200 ML21067A201 ML21067A202 ML21067A203 ML21067A204 ML21067A205 ML21067A206 ML21067A207 ML21067A208 ML21067A209 ML21067A210 ML21067A211 ML21067A212 ML21067A214 ML21067A215 ML21067A216 ML21067A217 ML21067A218 ML21067A219 ML21067A220 ML21067A221 ML21067A222 ML21067A223 ZS-2021-0001, Penetration Dose Calculation Spreadsheet
References
ZS-2021-0001
Download: ML21067A180 (2)

Text

~ Condition Report ENERGYSOLUTIONS ES-ZION-CR-2019-0176 Page 1 of 2 DETAILS Division: IRP Name:

Description:

1Small Piece of Concrete Above Background was Detected by ORISE 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 l l 1 1 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

~ Condition Report ENERGYSOLUTIONS ES-ZION-CR-2019-0176 Page 2 of 2 CAQ/NONCAQ? CAQ 50.75g Issue? False 1 l 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 End Date 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 Trends Cause Codes: A7-B2-C01-Legacy contamination C02 Source unknown Event Codes: $6LWH&ORVXUH )66VXUYH\LVVXH Verification Verification: Timothy W. Plutchak 12/12/2019 Verification Comments Close to actions taken as approved by MRC members on 12/12/19 meeting.

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