ML061450183
| ML061450183 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 08/30/2004 |
| From: | - No Known Affiliation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2006-0130 | |
| Download: ML061450183 (4) | |
Text
Go Back Print New Search l Home AR 00248494 Report, Aff Fac:
Dresden AR Type:
CR Status:
APPROVED Aff Unit:
00 Owed To:
A8330PRCAP Due Date:
06/01/2005 Aff System:
00 Event Date:
07/31/2004 CR 3/B Disc Date:
08/30/2004 Level/Class:
How H02 Orig Date:
08/30/2004 Discovered:
Action Request Details
Subject:
HIGH TRITIUM ACTIVITY IN ON-SITE WELLS AND STORM DRAINS
==
Description:==
Originator: JONATHAN R KALB Supv Contacted: Dan Malauskas Condition
Description:
Tritium activity as high as 6,125,891 (6.13E+06) pCi/L has been detected in on-site tritium monitoring wells In the vicinity of the 2/3 Reactor Building Trackway Interlock near the Unit 3 LPCI Suction Line from Condensate Storage Tank 'B.' The wells were sampled on 7-31-04. The following preliminary results were received from Environmental, Inc.on 8-26-04:
Well Tritium specific activity (pCi/L)
W-3 6,125,891, W-1 3,613,931 T-6 1,960,331 T-7 377,168-T-5 41,662 T-3 38,885 Re-analysis of the samples was directed at that time, Including gamma spectroscopy analysis for gamma-emitting nuclides. The Environmental, Inc. Program Coordinator was contacted on 8-30-04, and preliminary re-analysis results confirmed the high levels of tritium.
Tritium was also detected in a storm sewer located northeast of Unit 1 (DSP-132). Initial analysis results are 79,351 pCi/L.
The wells above are the shallow (baby) wells. The W-wells are located on the west side of the 2/3 Rx Building Trackway, the T-wells are on the east side.
Immediate actions taken:
When the high results were communicated to the site, the use of proper sample preparation techniques (distillation) was confirmed and re-analysis of the samples for tritium and re-sampling of the wells for tritium
-. E analysis was directed. Existing samples that Indicated greater than
> 20,000 pCi/L tritium were requested to be analyzed for gamma-emitting nuclides by gamma spectroscopy. The wells were re-sampled on 8-28-04 by Environmental, Inc.
Recommended action is to investigate the source of the tritium, including the Unit 3 LPCI suction line. Hydrostatic testing may indicate the system that is leaking. Testing of site domestic water for tritium is also recommended.
http://cccmva0 1:61 23/servlet/ReportAR 9/10/2004
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What activities, processes, or procedures were Involved?
Tritium sampling was being performed to determine If the recent earthquake had any adverse effect on the plant.
Why did the condition happen?
Indeterminate until further testing is performed. The likely cause is a leak in an underground pipe that contains radioactive plant fluids.
Reactor water tritium levels are 9 to 10 million pCi/L.
What are the consequences?
Because tritium Is a low-energy pure beta emitter, this is not a dose issue. This occurrence should be evaluated for Impact on the 10CFR50.75(g) files from the previous occurance of this nature. If excavations are performed, the dirt removed should be used to fill the hole to prevent an excessive site inventory of radioactive dirt. Because there is no valid pathway to drinking water systems, the EPA limit for tritium in drinking water Is not impacted.
Were any procedural requirements Impacted?
None. On-site tritium sampling is not required per plant procedures.
Were there any adverse physical conditions?
The recent earthquake may have contributed to an underground piping failure.
List of knowledgeable individuals:
Ellen Saar, Environmental, Inc.
Dan Malauskas, Acting Chemistry Manager Steve Bell, RP Repeat or similar condition?
The HPCI test underground return line failed in 1994, resulting in elevated tritium in the test wells (as high as 200,000 pCi/L) and the storm drains (450,000 pCi/L). The leak was repaired and groundwater tritium returned to background levels.
Operable Basis:
Reportable Basis:
At this time there is no identified pathway to drinking water sytems or release exceeding the ODCM Appendix A limit of 20,000 pCi/L.
SOC Reviewed by: DEBORAH L ANDERSON 09/02/2004 09:23:52 CDT SOC Comments:
Multi-discipline HIT team CH/ RP/ ENG developed 004 plan to identify the tritium source. OPS reviewed 004 plan and requested 5 additional samples.
Sample analysis Is inprogress. Sampling of the site domestic water identified no tritium detectable. Followup to Eng. to determine trackability of 004 plan results. Additional Followup OPS/RP to address ODCM and possible reportability. SOC 9/1/04 EACE to Engineering (Karaba) to determine source of tritium and initiate corrective actions as appropriate. CA to Chem (Kalb) to include the tritium unmonitored release into the Dresden 2004 Annual Effluent Report (due 2nd quarter 2005 to the NRC). CA to Chemistry (Kalb) to Establish and implement tritium monitoring plan. SOC 9/02/04 Assignments Assign #:
01 Dresden Assigned To:;
Prim Grp:
ACAPALL Status:
AWAIT/C Aff Fac:
Due Date:
12/02/2004 http://cccinva0l:61 23/servlet/ReportAR 9/10/2004
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.i vL -Ut Assign Type:
TRKG Sec Grp:
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Priority:
Schedule Ref:
Unit Condition:
Subject/Description: Tracking Assignment for Issue Assign #:
02 Assigned To:
KALBJR Status:
ACC/ASG Aff Fac:
Dresden Prim Grp:
A8332CHEM Due Date:
06/01/2005 Assign Type:
CA Sec Grp:
Orig Date:
06/01/2005 Priority:
Schedule Ref:
Unit Condition:
Subject/Description: Incorporate into the annual effluent report the tritium i ssue stated in IR 248494.
Assign #:
03 Assigned To:
KALBJR Status:
ACC/ASG Aff Fac:
Dresden Prim Grp:
A8332CHEM Due Date:
10/01/2004 Assign Type:
CA Sec Grp:
Orig Date:
10/01/2004 Priority:
Schedule Ref:
Unit Condition:
Subject/Description: CA to Chemistry (Kalb) to Establish and implement tritium monitoring plan.
Assign #
04 Assigned To:
DREYF Status:
COMPLETE Aff Fac:
Dresden Prim Grp:
Due Date:
09/03/2004 Assign Type:
TRKG Sec Grp:
Orig Date:
09/03/2004 Priority:
Schedule Ref:
Unit Condition:
Subject/Description: DOCUMENTING ADDITION OF WR TO THIS IR.
Assign #:
05 Assigned To:
Status:
NTFY/PRI Aff Fac:
Dresden Prim Grp
- A833ONESTP Due Date:
11/29/2004 Assign Type:
EACE Sec Grp:
Orig Date:
11/29/2004 Priority:
Schedule Ref:
Unit Condition:
McGivern: Perform EACE to determine source of tritium and initiate corrective actions as SubjectDescription: appropriate. Document the Equipment type Apparent Cause Evaluation using the template in the In-Progress notes. Ensure a copy of the completed EACE is provided to http://cccmvaO 1:61 23/servlet/ReportAR 9/10/2004
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the CAP Clerk prior to closing this assignment.
Assign #:
Aff Fac:
Assign Type:
Priority:
Schedule Ref:
Unit Condition:
Subject/Description:
06 Dresden ACIT Assigned To:.
Prim Grp:
I A833ONESTP Sec Grp:
Status:
Due Date:
Orig Date:
NTFY/PRI 11/01/2004 11/01/2004 McGivern: Closure of this assignment means the assignee has reviewed the Equipment Apparent Cause Evaluation (EACE) Just-in-Time Briefing as part of preparing the final report of this EACE.
Assign #:
07 Assigned To:
Status:
NTFY/PRI Aff Fac:
Dresden Prim Grp:
A833ONESTP Due Date:
12/07/2004 Assign Type:
MRC Sec Grp:
Orig Date:
12/07/2004 Priority:
Schedule Ref:
Unit Condition:
SubjectlDescription:
McGivern: Bring this EACE to MRC for approval.
Assign #:
08 Assigned To:
Status:
NTFY/PRI Aff Fac:
Dresden Prim Grp:
A833ONESTP Due Date:
12/16/2004 Assign Type:
ACIT Sec Grp:
Orig Date:
12/16/2004 Priority:
Schedule Ref:
Unit Condition:
Subject/Description: McGivern: Create an Internal OPEX and Training Request to Communicate Lessons Learned from the EACE (as applicable).
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