ML090540159
| ML090540159 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 07/30/2008 |
| From: | - No Known Affiliation |
| To: | NRC Region 1 |
| References | |
| Download: ML090540159 (3) | |
Text
SUMMARY
and STATUS of the IPEC Groundwater Monitoring Program July 2008 In July 2008, the initial self-assessment of the IPEC Groundwater Monitoring Program was completed using the Nuclear Energy Institute (NEI) checklist found in NEI 07-07, "Industry Ground Water Protection Initiative - Final Guidance Document".
IPEC has completed a comprehensive two year site investigation from September 2005 through September 2007 utilizing the services of GZA GeoEnvironmental, Inc. (GZA). Information gathered from this investigation was used to develop plant procedure IP-SMM-CY-1 10, "Radiological Ground Water Monitoring Program", which became effective in January 2008.
The NEI Ground Water Protection Initiative (GPI) was written to "improve utilities' management and response to instances where the inadvertent release of radioactive substances may result in low but detectible levels of plant-related materials in subsurface soils and water'. The GPI also addresses communication with stakeholders to "improve communication with external stakeholders to enhance trust and confidence on the part of local communities, States, the NRC, and the public in the nuclear industry's commitment to a high standard of public radiation safety and protection of the environment".
The discovery of the groundwater contamination at Indian Point in 2005 and the resulting investigation placed IPEC in a position at the forefront of the industry to actively engage in the two important aspects of the GPI cited above. Entergy aggressively responded to and managed the leaks at Unit I and Unit 2, and conducted frequent and open discussions with the regulators and stakeholders throughout the course of the investigation. Groundwater contamination plumes were identified from both Units 1 and 2, and a program was developed to capture the required monitoring and tracking, as well as comply with the Initiative for the entire site.
The IPEC Radiological Ground Water Monitoring Program (RGWMP) is defined in the ODCM and in station procedures. Approximately 37 wells and three specific storm drains are involved.
Most wells include sampling capacity at three or more depths. Some wells also have instrumentation to monitor changes in groundwater flow.
The RGWMP interacts with the following other site programs:
Progr~am Own eir RGWMP inteirface" Over 40 storm drains are periodically sampled and analyzed for gamma IE Bulletin NRC 80-10 and tritium. Analyses for other isotopes are initiated should gamma be Chem detected in the water. Three specific drains are also listed in the RGWMP, due to their proximity to potential upstream sources of contamination, per GPI.
Spills-and leaks are documented to capture possible areas_for increased investigation or remediation effort prior to decommissioning.
Groundwater that has been determined to be rad effluent is evaluated per Radiological Chem the ODCM. Potential offsite doses are calculated and reported to the NRC Effluents in the Annual Rad Effluent Release Report (RG 1.21).
Rad Environmental Two boundary wells are defined in the REMP sections of the ODCM.
Monitoring (REMP) Chem Water is tested for tritium, Strontium-90, and gamma emitters.
Page 1 of.4... F :
Trend Graph for Well: MW-30-69 Analyte Name: H-3 MCL Value: 20,000.00 Between Dates: 01/30/2006 and 05/06/2008 Standard Deviation : 3 Sigma 4.00e+005 3.50e4-005 3.00e+005 I
2.50e+005 0 2.00e+005 _ _ _ "_ _ _ _ _ _ __-= _ _ _ __,
1.50e+005 1.00e+005 5.00e+004 0.00e+000 1/30 1/30 1/30 Date Collected
-*-Max Result 9 Max MDC -MCL Value SampleName Sample Date/Time Result Standard Deviation MDC fMCL.
MW-30-74-(001) 01/30/2006 / 15:40 2.37E+005 2.76E+004 6.26E+002 1.19E+001 MW-30-74-(003) 06/23/2006 / 10:50 3.92E+005 5.76E+004 2.54E+003 1.96E+001 MW-30-74-(004) 08/18/2006 / 14:45 2.20E+005 3.35E+004 6.02E+003 1.10E+001 MW-30-74-(005) 11/29/2006 / 10:45 1.06E+005 4.20E+003 1.10E+003 5.30E+000 MW-30-74-(006) 01/16/2007 / 14:05 8.17E+0041 1.86E+003 5.30E+002 4.09E+000 MW-30-69-(007) 06/12/2007 / 10:20 2.97E+005 8.73E+003 6.34E+002 1.49E+001 MW-30-69-(007) 06/12/2007 / 10:20 2.88E+005 2.07E+003 1.70E+002 1.44E+001 MW-30-69-(008) 07/18/2007 / 9:55 8.21E+004 2.46E+003 7.OOE+002 4.11E+000 MW-30-69-(009) 07/25/2007 /11:26 2.17E+005- 6.51E+003 6.40E+002 1.069E+001 MW-30-69-(009) .07/25/2007 / 11:26 2.32E+005 6.83E+003 5.81E+002 1.16E+001 MW-30-69-(010) 08/01/2007/11:44 1.03E+005 3.09E+003 6.40E+002 5.15E+000 MW-30-69-(01 1) 08/08/2007 / 10:00 9.96E+004 2.99E+003 6.32E+002 4.98E+000 MW-30-69-(012) 08/15/2007 / 11:00 2.33E+005 6.99E+003 6.33E+002 1.17E+001 MW-30-69-(013) 08/21/2007/ 9:45 1.07E+005 3.21EE+003 7.05E+002 5.35E+000 MW-30-69-(014) 08/30/2007 / 11:32 9.80E+004 2.94E+003 7.03E+002 4.90E+000 MW-30-69-(015) 09/19/2007 / 11:00 9.20E+004 2.76E+003 7.02E+002 4.60E+000
- MW-30-69-(016)-- ----- 10/23/2007 /--1-1:48 ...... 1-.32E+005 -.. . . 3.90E+003 .-. -. 4.24E+002 - 6.60E+000--
MW-30-69-(017) 02/04/2008/ 13:00- 1.87E+005 5.51E+003 3.95E+002 9.35E+000 MW-30-69-(018) 05/06/2008 / 11:00 1.53E=+005 4.52E+003. 4.06E+002 7.65E+000 Page 3 of 4
Trend Graph for Well: MW-42-49 Analyte Name: Sr-90 MCL Value: 8.00 Between Dates: 03/23/2006 and 05/13/2008 Standard Deviation : 3 Sigma I_
1.20e+002 1.00e+002 "__
8.00e+001 6.00e +001
&* 4.00e+001 2.00e+001 0.00e+000 _ _ _ _ _ _ _ _ _ _ _ _ _ Aim 3/23 3/23 3/23 Date Collected
-*-Max Resuft S Max MDC -- MCL Value SampleName Sample Date/Time Result Standard Deviation MDC fMCL MW-42-51-(001) .03/23/2006 / 11:15 5.19E+001 1.72E+000 4.88E-001 6.49E+000 MW-42-51-(002) 03/31/2006 / 9:29 2.10E+001 9.96E-001 3.67E-001 2.63E+000 MW-42-51-(003) 04/07/2006 / 17:52 1.09E+002 2.16E+000 4.09E-001 1.36E+601 MW-42-49-(004) 06/18/2007 / 15:00 7.73E+001 4.04E+000 6.07E-001 9.66E+000 MW-42-49-(005) 08/02/2007,/ 14:37 5.02E+001 2.96E+000 9.41E-001 6.28E+000 MW-42-49-(006) 08/17/2007 / 9:30 2.1E+001 2.,01E+000 6.03E-001 2.51 E+000 MW-42-49-(007) 10/04/2007 / 12:40 4.65E+001 3.12E+000 6.02E-001 5.81 E+000 MW-42-49-(008) 01/21/2008 / 16:11 3.34E+001 3.18E+000 9.11E-001 4.17E+000 MW-42-49-(0i0) 60513/2008 / 13:20. 2.36E+001 2.31E+000 5.48E-001 2.95E+000 Page 4 of 4