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| EM-SR--SRMC-FTANK-2025-0003 | FINAL |
(Name of Facility)
Nuclear Waste Operations/Disposal
(Facility Function)
| Savannah River Site | Savannah River Mission Completion |
(Laboratory, Site, or Organization)
| Name: Lisa Amidon | |
| Telephone No.: (803) 208-8592 | |
(Facility Manager/Designee)
| Name: Johnson, Rhonda Amanda | |
| Telephone No.: (706) 840-2388 | |
(Originator/Transmitter)
| Name: John Lowery | Date: 07/22/2025 |
(Authorized Classifier (AC))
1. Occurrence Report Number: EM-SR--SRMC-FTANK-2025-0003
Legacy Contamination, Wasp Nest in Controlled Area
2. Report Type and Date: FINAL
| 07/22/2025 | 16:14 (ETZ) |
| 07/22/2025 | 16:14 (ETZ) |
| 07/22/2025 | 16:14 (ETZ) |
| 07/22/2025 | 16:14 (ETZ) |
4. Division or Project: Savannah River Mission Completion, LLC
5. Secretarial Office: EM - Environmental Management
6. System, Bldg., or Equipment: 241-127F
8. Plant Area: F-Area Tank Farm
9. Date and Time Discovered:
07/03/2025 13:51 (ETZ)
10. Date and Time Categorized:
07/03/2025 20:25 (ETZ)
| NA | NA | NA | NA |
| 07/03/2025 | 20:45 (ETZ) | Andre Durham | DFac Mgr |
| 07/03/2025 | 20:55 (ETZ) | Tommy Chalker | RCO |
| 07/03/2025 | 20:55 (ETZ) | Sarah Bauske | Fac Eng |
| 07/03/2025 | 21:14 (ETZ) | Amanda Johnson | SIRIM |
| 07/03/2025 | 21:17 (ETZ) | David Harmon | DOE FR |
| 07/03/2025 | 21:21 (ETZ) | Carol Borders | EDO |
| 07/03/2025 | 21:12 (ETZ) | Phillip Owens | S&H |
| 07/03/2025 | 21:09 (ETZ) | Oscar Pete | QA |
| 07/03/2025 | 21:10 (ETZ) | Brad Powell | ECA |
| 07/03/2025 | 21:10 (ETZ) | Heather Velasko | PAAA |
| 07/03/2025 | 21:17 (ETZ) | Zach McCabe | DNFSB |
| 07/03/2025 | 20:25 (ETZ) | Lisa Amidon | Fac Mgr |
| 07/03/2025 | 21:17 (ETZ) | Leigh Lin | DNFSB |
13. Subject or Title of Occurrence:
Legacy Contamination, Wasp Nest in Controlled Area
14. Reporting Criteria:
6B(4) - Identification of onsite legacy radioactive contamination greater than 10 times the total contamination values in 10 CFR Part 835 Appendix D, exclusive of footnote 3 to Appendix D, and that is found outside of the following locations: areas routinely posted, controlled, and monitored for contamination; and areas controlled in accordance with 10 CFR Section 835.1102(c); and, per 10 CFR Section 835.604(a), any non posted area that is under the continual observation and control of an individual empowered to implement access and exposure control measures. For tritium, the reporting threshold is 10 times the removable contamination values in 10 CFR Part 835, Appendix D.
15. Description of Occurrence:
Radiological Control Operation (RCO)discovered a wasp nest on a stanchion near 241-127F (adjacent to Tank 17) in a Controlled Area. The wasp nest was sprayed to kill the wasps. RCO probed the nest and discovered it was probing 100,000 dpm/100 cm2 beta/gamma. This contamination level is greater than 10 times the total contamination values in 10 CFR 835 Appendix D. The wasp nest is considered onsite legacy radioactive contamination not related to a loss of contamination control. The delay in reporting was to allow time for reviewing previous wildlife contamination for consistency in reporting criteria.
Evaluation: No further action required in the field.
Delay in reporting per Manual 9B Procedure 1-0 Attachment 8.1, was due to time needed to investigate previous contaminated wasp circumstances and gather information
for ORPS criteria evaluation.
Impact: There is no impact from event on other activities and operations.
16. Is Subcontractor Involved? No
19. Immediate Actions Taken and Results:
The wasp nest was sprayed to kill wasps, then bagged as radiological waste. The ground and surrounded area did not have any contamination.
20. ISM: 5) Provide Feedback and Continuous Improvement
21. Cause Code(s):
22. Description of Cause:
25. Corrective Actions
Local Tracking System Name: STAR - Site Tracking, Analysis and Reporting
26. Lessons Learned:
2025-CTS-006827
27. Similar Occurrence Report Numbers:
EM-SR--SRR-HTANK-2017-0010
06B--Radiological - Facility/Equip/Site Contamination
On July 3, 2025, Radiological Control Operation (RCO) discovered a wasp nest on a stanchion near 241-127F (adjacent to Tank 17) in a Controlled Area. The wasp nest was sprayed to kill the wasps. RCO probed the nest and discovered it was probing 100,000 disintegrations per minute/100 square centimeters beta/gamma. This contamination level is greater than 10 times the total contamination values in 10 Code of Federal Regulation 835 Appendix D. The wasp nest is considered an onsite legacy radioactive contamination not related to a loss of contamination control. The delay in reporting was to allow time for reviewing previous wildlife contamination for consistency in reporting criteria. No further action was required in the field. There is no impact from event on other activities and operations.
EM-SR--SRR-HTANK-2021-000
30. HQ Keyword(s):
11D--Other - Natural Phenomena
12M--EH Categories - Radiological Control
14L--Quality Assurance - No QA Deficiency
31. HQ Summary:
