PNO-IV-06-010, Southern California Edison Subject: Tritium Detected in Water Samples Taken on the Site: Difference between revisions
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{{#Wiki_filter:August 15, | {{#Wiki_filter:August 15, 2006 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-06-010 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region IV staff on this date. | ||
Facility Licensee Emergency Classification Southern California Edison Notification of Unusual Event San Onofre Nuclear Generating Station, Unit 1 Alert San Clemente, CA Site Area Emergency Docket: 50-206 General Emergency License: DPR-13 X Not Applicable | |||
==SUBJECT:== | ==SUBJECT:== | ||
TRITIUM DETECTED IN WATER SAMPLES TAKEN ON THE SITE DESCRIPTION: | TRITIUM DETECTED IN WATER SAMPLES TAKEN ON THE SITE DESCRIPTION: On August 7, 2006, the licensee identified low levels of tritium (hydrogen-3) measured in water samples taken at the Unit 1 site which is undergoing decommissioning. The tritium levels ranged from 50,000 to 330,000 picoCuries per liter. These levels are below the threshold for required reporting specified in 10 CFR Part 20. On August 14, 2006, the licensee made a voluntary communication to California state and local government agencies regarding this issue. The groundwater beneath the site is not a source of drinking water. | ||
The licensee is investigating possible sources of the tritium. The Unit 1 reactor ceased commercial operations in 1992 and in recent years has been undergoing dismantlement and decommissioning. | |||
The onsite NRC resident inspectors have reviewed the licensees measurement results and activities. NRC regional radiation specialists will continue to monitor the measurements and licensee assessments during inspections of Unit 1 decommissioning activities. | |||
While the licensee's environmental monitoring continues, the radioactive contamination poses no danger to public health and safety. | |||
Region IV has informed EDO, NRR, and PA. | |||
The licensee voluntarily notified the NRC Operations Center of this situation at 12:08 p.m. PDT on August 14, 2006. The information presented herein has been discussed with the licensee and is current as of 12:00 p.m. on August 15, 2006. | |||
ADAMS ACCESSION NUMBER: ML062270388 CONTACTS: Michael P. Shannon, Chief D. Blair Spitzberg, Chief Plant Support Branch Fuel Cycle & Decommissioning Branch 817-860-8215 817-860-8191 mps1@nrc.gov dbs@nrc.gov}} | |||
{{PNO-Nav|region=IV}} | {{PNO-Nav|region=IV}} |
Latest revision as of 16:01, 23 November 2019
ML062270388 | |
Person / Time | |
---|---|
Site: | San Onofre ![]() |
Issue date: | 08/15/2006 |
From: | Shannon M, Spitzberg D Division of Nuclear Materials Safety IV |
To: | |
References | |
PNO-IV-06-010 | |
Download: ML062270388 (1) | |
August 15, 2006 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-06-010 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region IV staff on this date.
Facility Licensee Emergency Classification Southern California Edison Notification of Unusual Event San Onofre Nuclear Generating Station, Unit 1 Alert San Clemente, CA Site Area Emergency Docket: 50-206 General Emergency License: DPR-13 X Not Applicable
SUBJECT:
TRITIUM DETECTED IN WATER SAMPLES TAKEN ON THE SITE DESCRIPTION: On August 7, 2006, the licensee identified low levels of tritium (hydrogen-3) measured in water samples taken at the Unit 1 site which is undergoing decommissioning. The tritium levels ranged from 50,000 to 330,000 picoCuries per liter. These levels are below the threshold for required reporting specified in 10 CFR Part 20. On August 14, 2006, the licensee made a voluntary communication to California state and local government agencies regarding this issue. The groundwater beneath the site is not a source of drinking water.
The licensee is investigating possible sources of the tritium. The Unit 1 reactor ceased commercial operations in 1992 and in recent years has been undergoing dismantlement and decommissioning.
The onsite NRC resident inspectors have reviewed the licensees measurement results and activities. NRC regional radiation specialists will continue to monitor the measurements and licensee assessments during inspections of Unit 1 decommissioning activities.
While the licensee's environmental monitoring continues, the radioactive contamination poses no danger to public health and safety.
Region IV has informed EDO, NRR, and PA.
The licensee voluntarily notified the NRC Operations Center of this situation at 12:08 p.m. PDT on August 14, 2006. The information presented herein has been discussed with the licensee and is current as of 12:00 p.m. on August 15, 2006.
ADAMS ACCESSION NUMBER: ML062270388 CONTACTS: Michael P. Shannon, Chief D. Blair Spitzberg, Chief Plant Support Branch Fuel Cycle & Decommissioning Branch 817-860-8215 817-860-8191 mps1@nrc.gov dbs@nrc.gov