IR 05000320/2025002
| ML25204A005 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/04/2025 |
| From: | Anthony Dimitriadis Decommissioning, ISFSI, and Reactor Health Physics Branch |
| To: | Richardson J TMI-2 Energy Solutions, TMI-2 Solutions |
| References | |
| IR 2025002 | |
| Download: ML25204A005 (1) | |
Text
August 4, 2025
SUBJECT:
THREE MILE ISLAND NUCLEAR STATION UNIT 2 - NRC INSPECTION REPORT NO. 05000320/2025002
Dear Jeff Richardson:
On June 30, 2025, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at your Three Mile Island Nuclear Station Unit 2. The results of this inspection were discussed with Laszlo von Lazar, Executive Project Director, and other members of your staff on July 2, 2025, and are described in the enclosed report.
No violations of more than minor significance were identified during the inspection.
In accordance with Title 10 of the Code of Federal Regulations (CFR) 2.390 of the NRCs Rules of Practice and Procedures, a copy of this letter and its enclosure, and your response (if you choose to provide one) will be made available electronically for public inspection in the NRC Public Document Room and from the NRCs Agencywide Document Access and Management System (ADAMS),
accessible from the NRC website at http://www.nrc.gov/reading-rm/adams.html. To the extent possible, your response should not include any personal privacy or proprietary information so that it can be made available to the public without redaction.
Sincerely, Anthony Dimitriadis, Chief Decommissioning, ISFSI, and Reactor Health Physics Branch Division of Radiological Safety and Security
Docket No.
05000320 License No. DPR-73
Enclosure:
Inspection Report No. 05000320/2025002
Inspection Report
Docket No.
05000320
License No.
Report No.
Enterprise Identifier:
I-2025-002-0060
Licensee:
TMI-2 Solutions, LLC (TMI-2S)
Facility:
Three Mile Island Nuclear Station, Unit 2 (TMI-2)
Location:
Middletown, PA 17057
Inspection Dates:
April 1, 2025, to June 30, 2025
Inspectors:
H. Anagnostopoulos, CHP, Senior Health Physicist
K. Warner, CHP, Senior Health Physicist
S. Veunephachan, Senior Health Physicist
Accompanied By:
G. Eklund, Health Physicist
N. Harmon, CHP, Health Physicist
G. Pennington, General Engineer
Approved By:
Anthony Dimitriadis, Chief
Decommissioning, ISFSI and Reactor Health Physics Branch
Division of Radiological Safety and Security
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) conducted a routine inspection of design changes, problem identification and resolution, decommissioning performance and status, material control and accountability, occupational radiation exposure, environmental and effluent monitoring, and solid radioactive waste storage. The inspection consisted of observations by the inspectors, interviews with site personnel, a review of procedures and records, and site walk-downs. The NRCs program for overseeing the safe decommissioning of a permanently shutdown nuclear power reactor is described in Inspection Manual Chapter (IMC) 2561, Decommissioning Power Reactor Inspection Program.
List of Violations
No violations of more than minor significance were identified.
Additional Tracking Items
None.
SITE STATUS
TMI-2 is currently inspected under Category 3, Decommissioning (DECON), No Fuel in the Spent Fuel Pool as described in IMC 2561. The inspectors noted that during this inspection period, TMI-2S continued decontamination and removal of interferences in the fuel transfer canal, continued construction of the decommissioning support building, finished removal of the plates and beams that served as a cover for spent fuel pool A, and continued work on enlargement of the equipment hatch.
INSPECTION SCOPES
The inspection was conducted using the appropriate portions of the inspection procedures (IPs).
Currently approved IPs are located on the public website at http://www.nrc.gov/reading-rm/doc-collections/insp-manual/inspection-procedure/index.html. The inspectors reviewed select procedures and records, observed activities, and interviewed personnel to assess licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards. The inspection was declared complete when the objectives of the IP were met, consistent with Inspection Manual Chapter (IMC) 2561, Decommissioning Power Reactor Inspection Program.
IP 37801, Safety Reviews, Design Changes, and Modifications at Permanently Shutdown Reactors
The inspectors reviewed a sampling of modifications and design changes to determine if they were appropriately screened by TMI-2S under 10 CFR 50.59 and/or if the changes required prior NRC approval. The reviewed changes included the addition of temporary chillers that supply chilled air to the air intake tower which provides cooling to the reactor building (TMI2-EN-MPKG-E-00-0055).
IP 40801, Problem Identification and Resolution at Permanently Shutdown Reactors
The inspectors evaluated TMI-2S' corrective action program (CAP) by reviewing a sample of issues to determine if they were identified, entered, and assessed according to their safety significance. The inspectors examined CAP documents to evaluate if a low threshold for problem identification and appropriate prioritization for issue resolution was achieved. The inspectors also attended corrective action review board meetings, including meetings for a root cause analysis of a February 2025 reactor building fire, to determine if issue resolution was appropriate based on safety significance.
IP 71801 Decommissioning Performance and Status Reviews at Permanently Shutdown Reactors
The inspectors observed work activities and performed walk-downs associated with the following:
1) Accessible areas of the auxiliary building, turbine building, fuel handling building, and the reactor building.
2) Observation of rigging and removal of a shield plate in the fuel transfer canal.
3) Observation of hot work for the equipment hatch enlargement.
IP 83750, Occupational Radiation Exposure at Permanently Shutdown Reactors
The inspectors conducted site walk-downs of the following areas:
1) Waste gas analyzer room in the auxiliary building in which the inspectors verified controls for the two makeup and purification demineralizer rooms, which are posted very high radiation areas.
2) Accessible areas of the auxiliary building, turbine building, fuel handling building, and reactor building.
The inspectors reviewed radiation work permits and as low as reasonably achievable (ALARA) plans associated with the activities listed under IP 71801 above.
The inspectors examined a selection of portable high efficiency particulate air filtration systems and filtered vacuum cleaners to determine if they were correctly configured, placed, and operated in a manner which mitigates the potential for airborne radioactivity.
The inspectors observed smoke testing of the reactor building to determine if the expected air flow velocity and direction were accurately verified.
IP 84750, Radioactive Waste Treatment, and Effluent and Environmental Monitoring
The inspectors reviewed activities and documentation and performed walk-downs associated with radioactive effluent control and the site radiological environmental monitoring program (REMP) to assess the effectiveness of site radiological programs.
Documents reviewed included:
1) Offsite Dose Calculation Manual, Revision 12.
2) Calibration records for effluent monitors RM-L-6, RM-L-7, and RM-L-12.
Areas walked down by the inspectors included:
1) Environmental monitoring stations, including stations E1-2 and A3-1.
2) Select portions of TMI-2 liquid effluent pathways.
3) TMI-2 water collection locations, including the auxiliary building, control building, control and service area, tendon access gallery, and turbine building sumps to determine whether there are any adverse material conditions or other issues.
IP 86750, Solid Radioactive Waste Management and Transportation of Radioactive Materials
The inspectors performed walk-downs in and around the turbine building and auxiliary building to assess the licensees program for storage of radioactive material to determine whether solid radioactive waste was adequately stored and monitored.
IP 85103, Material Control and Accounting at Decommissioning Nuclear Power Reactors
The inspectors examined the programs, processes, procedures, and records related to the material control and accountability (MC&A) of special nuclear material (SNM) as specified in 10 CFR 74.19, including a review of CAP entries and a walkdown of several SNM storage locations to determine whether the material was present at the designated locations.
INSPECTION RESULTS
No violations of more than minor significance were identified.
IP 84750, Radioactive Waste Treatment, and Effluent and Environmental Monitoring
The inspectors noted that approximately 11 pCi/kg of Strontium-90 was detected in one tomato sample collected in August 2024. Based on a review of the laboratory report, the inspectors questioned whether the result represented a false positive, as the value was near the detection limit and not found in other samples.
IP 85103, Material Control and Accounting at Decommissioning Nuclear Power Reactors
The inspectors performed a review and evaluation of CR-2025-0401 during the inspection and will extend the review to related documentation during the next scheduled inspection.
EXIT MEETING/DEBRIEFS
On July 2, 2025, the inspectors presented the inspection results to Laszlo von Lazar, Executive Project Director, and other members of the TMI-2S organization. No proprietary information was retained by the inspectors or documented in this report.
DOCUMENTS REVIEWED
CR-2024-0806
CR-2024-1142
CR-2025-0401
CR-2025-0502*
CR-2025-0642*
- Corrective Action Documents Resulting from Inspection.