ML25288A016
| ML25288A016 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 10/15/2025 |
| From: | ADP CR3 |
| To: | Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML25288A001 | List:
|
| References | |
| 3F1025-01 | |
| Download: ML25288A016 (1) | |
Text
ENCLOSURE 9 Crystal River Unit 3 Nuclear Generating Plant Docket Nos. 50-302 / 72-1035 Operating License DPR-72 50.75(g) List of Events/Issues Affecting ADP CR3 Areas Begins On Next Page lef 3F1025-01 / Enclosure 9
1 10 CFR 50.75(g) List of Events/Issues Affecting ADP-CR3 Areas Date Location CR#
Comments 12/6/2006 Settling Ponds 215535 NRC inspector commented that the settling ponds were not in the 10 CFR §50.75(g) decommissioning file database. The location was added.
4/3/2007 West of PA 228274 Trace levels of tritium detected in groundwater monitoring wells CR3-5, CR3-7, and CR3-8 on the western perimeter of the Protected Area fencing. Typical values around 1,000 picoCuries per liter (pCi/L) or less.
10/8/2008 SW Berm 300365 Trace amounts of Cs-137 (0.45 picoCuries per gram [pCi/g])
found in excavated soil during demolition of Outage support Building. Reference Survey 08-10-0026.
12/10/2015 143 AB 310478 SFDM-1 effluent sample valve SFV-177: Overflow of funnel while sampling by Chemistry. This contaminated the floor in the clean area on 143' AB. Floor was cleaned up. Amount of spill likely was less than 1 liter.
9/22/2009 West Settling Ponds 336767 Review of Chemistry REMP data shows small amounts of licensed activity in the Settling Ponds. The highest soil sample showed 27 picoCuries per kilogram (pCi/kg) of Cs-137 and 299 pCi/kg of Co-60. The source of the activity are SDT-1 releases. The Cs-137 concentration is at and near background.
10/1/2009 Satellite RCAs none Pre-outage baseline surveys were performed in the following four satellite RCA areas: Shipping Area (Survey 09-06-0266), EPU Area (Survey 09-05-0193), SGR Area (Survey 09-05-0193), and Storage Area (Survey 09-05-0244). No licensed contamination was found.
2/19/2009 East of Berm 320618 Trace amounts of licensed material were found in soil in the "swamp" area east of Maintenance Building adjacent to the berm. The soil was created during leveling activities in preparation for installing temporary trailers for the upcoming outage. The soil was not removed.
Reference Survey 09-02-0109.
3/24/2009 SW berm to Laydown area near Fitness Building none Several cubic yards of excavated soil from near the equipment hatch were brought outside the PA near the Fitness Building. Soil was sampled prior to movement and showed no licensed activity above background. The highest Cs137 activity was 0.12 pCi/g, which is consistent with background. No other licensed activity found.
Reference Survey 09-03-0185.
1/28/2009 SW berm 316860 Hot particle of Co-60 (9,000 disintegrations per minute
[dpm]) found during dismantlement of the old Outage Support Building. Remediation was successful.
3F1025-01 / Enclosure 9 / Page 1 of 5
2 Date Location CR#
Comments 7/20/2010 NE Berm 411245 The contaminated nitrogen line was cut during excavation of soil in front of the Turbine Building roll-up door. A small amount of contaminated water was released onto the soil below. All soil was remediated and shipped off site as radioactive waste. Contamination levels in the soil were just above environmental low-level detection (LLD) limits for Co-60 and Cs-137. See Apex spectrum 20-Jul-2010-0006. Co-60 was 1.56E-7 microCuries per gram (µCi/g) and Cs-137 was 7.72E-5
µCi/g. No other radionuclides were identified via gamma spectroscopy.
7/16/2010 Aux Build 95' 410612 Contaminated water leaked from WDV-287 located above WDP-5A. The area was posted as a CA, then remediated.
1/19/2011 "A" Decay Heat Vault 448181 Water seeping through the concrete wall showed elevated tritium of 50,000 pCi/L and trace amounts of Cs-137. The area is inside a posted CA in the Aux Building. Also see CR 443392.
9/11/2012 South Berm 560532 Trace amounts of Cs-137 were detected under the wood cribbing removed in front of the equipment hatch.
Cribbage and loose debris were shipped off site as radioactive waste.
8/14/2012 West Berm 555078 Excavated soil next to SDT-1 showed 3 pCi/g Cs-137. Soil was taken just under a pipe weld with minor degradation. All soil shipped off site as radioactive waste.
4/29/2013 South Berm 603660 Trace amounts of Cs-137 and Co-60 were detected in the storm drain about 1 foot from OSSI-7 in front of the green room. Gamma spectrum# 25-Apr-2013-0004.
Activities: 2.35E-8 µCi/g of Co-60 and 2.0E-6 µCi/g of Cs-137. No other licensed material identified. Reference Survey Numbers 13-04-0209 and 13-04-0210. Also see NTM 229460 assignment 74 for follow-up information.
1/27/2016 Back Berm 1995427 Independent Spent Fuel Storage Installation (ISFSI) -
hydraulic leak on pump skid at 1700 on 1/26/16; Contractor Supervision discovered hydraulic fluid in the pump skid catch basin. Contractor Supervision contacted ISFSI Oversight Lead and Project HP technician, and the Project personnel made notification to the Control Room. Approximately 8 to 10 gallons of fluid had been released from the pump into the built-in drip pan/catch basin. Fluid had sprayed onto the inside of a tarp that, as part of the spill prevention plan, had been covering the pump. The tarp allowed all sprayed fluid to be funneled into the catch basin. There was no fluid spilled into the berm. Spill containment kits 3F1025-01 / Enclosure 9 / Page 2 of 5
3 Date Location CR#
Comments stationed in the area and pumps were used to clean up and dispose of the fluid. The Health Physicist (HP) free-released the waste generated by the cleanup, and the remaining fluid is being stored in staged FHCR-5 fluid/oil waste drums for later disposal by the Project.
The leak is under investigation. Konecrane will issue a PCAR in their system to track the investigation.
Immediate Actions Taken: Yes. Spilled fluid was cleaned up and waste material was disposed of.
(Also see NCR 1995990 for additional information) 2/2/2017 Back Berm 1998132 At approximately 1400 on 2/3/16, Contractor Supervision notified Duke that they had discovered hydraulic fluid in the pump skid catch basin. Approximately 3 to 4 gallons of fluid had been released from the pump into the built-in drip pan/catch basin. This release was from the same O-ring as the 1/26/16 incident. There was no fluid spilled into the berm. The Control Room, ISFSI Oversight lead, and HP were notified. Spill containment kits stationed in the area were used to clean up and dispose of the fluid, and the HP worked to free-release the six bags of generated oil cloth and rags. Konecrane will issue a PCAR in their system to track the investigation.
Immediate Actions Taken: Yes. Work was stopped. The Control Room, ISFSI Oversight lead, Environmental, and HP were notified. All fluid was cleaned and handled properly.
Other Actions Needed: Yes. Investigation into O-ring failure. The contractor is conducting an engineering review of design and operation.
5/6/2016 East Berm 2026952 During demolition of the ready warehouse, approximately 1 to 2 gallons of hydraulic fluid was spilled on the ground. Contractor was removing the ready warehouse elevator hydraulic piston when a weld on the piston broke. This allowed fluid to spill onto the ground instead of being contained in the elevator pit as planned.
Immediate Actions Taken: Yes. Work was stopped, the Control room, Environmental, Management, and Safety were notified. After evaluation of the area, the piston was removed, and the spilled fluid was cleaned up and properly disposed of.
5/24/2016 Rail Spur 2032141 The B Steam Generator (OTSG) was moved from the storage mausoleum to the rail spur area to finish preparing the component for shipment. The transporter supporting the OTSG was covered in grifflon as a proactive measure to capture any contamination that could become loose during the roll process. The rolling 3F1025-01 / Enclosure 9 / Page 3 of 5
4 Date Location CR#
Comments process positions the OTSG for transport. On 5/23/2016, the OTSG roll process started. During the end of the roll process, approximately 20 gallons of water seeped out of the feed water flange area that was awaiting permanent blind flange installation and was not water-tight. All water was captured, with the exception of <1 gallon, which seeped through the grifflon to an area below the transporter. All smears on the grifflon showed no contamination; however, an isotopic analysis of the water captured indicated low levels of Cs-137 (6.2E-7 microCuries per cubic centimeter [µCi/cc]). All individuals cleared the contamination monitors. Follow-up smears and dirt samples below the transporter have been taken. Smears are clean (non-detect) and dirt samples #5 through #8 are awaiting isotopic results. Dirt sample #1 was taken directly below the feed water flange and shows very low levels of Cs-137 activity (5.6E-8 µCi/g). Dirt samples #2 through #4 taken around sample #1 show no detectable activity.
Immediate Actions Taken: Yes. Upon noticing water coming out of the feed water flange, a 5 gallon bucket was placed under leak. A small kiddie pool was then placed under leak in conjunction with bucket. All the water on the grifflon and was mopped up and collected.
All water collected was transferred to a 55-gallon drum.
Other Actions Needed: Yes. Follow-up dirt/soil samples under the area of the leak. Complete; taken on 5/24/2016.
Present Elsewhere: Yes. This process and lessons learned need to be applied to the 'A' OTSG that is located in the Storage Mausoleum.
8/13/2017 ISFSI Pad 2143281 On 8/10/17, a sample of sand was obtained from inside the ISFSI pad drainage system as a follow-up to NCR 2141449. This sample was sent to Chemistry for isotopic analysis. The isotopic results showed the presence of radioactive material (Cs-137; 2.05E-7 µCi/g). Since the ISFSI drainage system (downstream of where this sample was obtained) is outside of the ISFSI Radiologically Controlled Area (RCA), it is recommended that access into those parts of the drainage system be controlled until an evaluation can be made to determine the type and quantity of any radioactive material that might be present.
Present Elsewhere: Yes. Radioactive material might be downstream of where this sample was obtained.
3F1025-01 / Enclosure 9 / Page 4 of 5
5 Date Location CR#
Comments 8/25/2017 ISFSI Pad 2146348 At approximately 0440, the fuel return line that attaches to a barbed fitting became dislodged on the light plant located at the northeast corner of the ISFSI pad.
Although there existed a catchment under the light plant, approximately 1 gallon of diesel fuel exited the catchment. There was a rain event ending approximately 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> earlier, and it is believed that this was a contributing factor in the diesel fuel exiting the catchment. The diesel fuel was contained to the ISFSI apron and sidewalk that runs the periphery of the ISFSI apron. No diesel fuel entered any waterways or the drainage system.
Immediate Actions Taken: Yes. TN personnel shut down the light plant. TN personnel secured the diesel fuel leak. TN personnel utilized spill kits to contain and clean up the fuel spill. TN Project Coordinator notified Duke Oversight. Duke Oversight notified the CR3 Control Room. Duke Oversight contacted the ISFSI Project Safety CR3 Control room to contact Duke Environmental Other Actions Needed: Yes. TN to clean up the diesel fuel spill.
7/28/2019 CC/Aux Building/TB None On July 28, 2019, it was observed via the Hot Shop cameras that the Aux Building (AB) sump, Turbine Building (TB) sump, Tendon Gallery, and B Decay Heat area had elevated water levels. It was later determined that about 15,000 gallons of domestic water had entered the AB and TB buildings from the 95 Control Complex (CC) due to a faulty valve lineup associated with final cold and dark preparations for SAFSTOR2. No condition report was generated. Much of this water, determined to be Domestic Water (DO), backed up through toilets on the 95 CC and then entered the AB and TB. Various floor drain levels were also observed to be elevated; however, no floor drains were identified above the flange level; thus, there was no spread of contamination out of the floor drains. Operations is planning to divert some of the AB water to the MWST.
TB sump water will be evaporated with the help of surface blowers. As of August 14, it does not appear that any significant spread of contamination has occurred due to this domestic water intrusion.
3F1025-01 / Enclosure 9 / Page 5 of 5