ML101930316
| ML101930316 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 06/09/2010 |
| From: | - No Known Affiliation |
| To: | Office of Information Services |
| References | |
| FOIA/PA-2010-0209 | |
| Download: ML101930316 (5) | |
Text
Response from Catawba Nuclear Station ONSITE GROUND/SURFACE WATER MONITORING QUESTIONNAIRE
- Onsite Radiological Effluent/REMP Monitoring Program Phase I (Near Term Response)
Yes No
- 1. l)oes th',liccnsee have radioactive groundwater monitoring wells onsite? S If YEvS! How many wells: Catawba has ten (10) onsite aroundwater monitoring wells.
See Note 1.
Where ,re they located (e.g., distributed around/throughout the site, in a particular region of the site and/or near particular buildings/structures, etc.)
(a) A:yjwithin the Protected Area 0 I' (b ,iMthinthe Radiologically Restricted Area 0 []
(c) 'vithin the owner-controlled area El
,(d) at what frequency does the licensee sample/analyze the wells Groundwater wells are sampled and analyzed semi-annually. See Note 2.
(e., "for what radionuclides does the licensee monitor Gamma emitters (Gamma Spec) FR 0 If Yes - at what MDA See below.
Tritium FR If Yes - at what MDA See below.
Gross Beta [ 0 If Yes - at what MDA See below.
Other: 0l IR If Yes - at what MDA Typical Minimum Detectable Nuclide Activity (MDA) (pWi/l)
Gross Beta 4 Tritium 250 Mn-54 6 Fe-59 17 Co-58, Co-60 9 Zn-65 4 Zr-95 8 Nb-95 3 1-131 6 Cs-134 6 Cs-137 9 Ba/La-140 11
)
Response from Catawba Nuclear Station Yes No
- 2. If the licensee does NOT have an onsite radioactive groundwater monitoring program:
(a) Does the licensee plan to implement a groundwater E] El imonitoring program?
If Yes, when and to what extent:
(b), Does the licensee plan to take other measures to assure they El 0l
- ,, can identify radioactive groundwater contamination?
- 3. Does the&licensee have a french drain system surrounding the main IxJE reactor facility and auxiliary structures?
(a) is.the system analyzed for radionuclides? MEJ El (b) at what frequency does the licensee sample/analyze the wells Catawba has aGround Water Drainage System (WZ System).
This system collects the groundwater drainage from under the site and channels it into the WZ sumps. A grab sample from these sumps is collected and analyzed monthly.
(c) lbr what radionuclides does the licensee monitor Gamma emitters (Gamma Spec) Iz] El If Yes - at what MDA See below Tritium 0] El If Yes - at what MDA See below Gross Beta l ff]
If Yes - at what MDA
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Response from Catawba Nuclear Station Typical Minimum Detectable Nuclide Activity (MDA) (OCiil)
Tritium 5,098 Mn-54 28 Fe-59 17 Co-58, Co-60 25 Zn-65 50 Zr-95 53 Nb-95 29 Mo-99 312 1-131 26 Xe-133 73 Xc-135 21 Cs-134 21 Cs-137 33 Ba/La-140 111 Ce-141 36 Cc-144 183
- 4. Does tI licensee have a surveillance program to periodically: Yes No (a) valkdown outside areas around the site to look for potential leaks and spills? .19 E 3rcssurize buried radwaste lines to evaluate structural integrity hid evaluate potential for leaks and spills? El FI]
- 5. ýnsee perform any other onsite monitoring (e.g., soil identify unexpected radioactive releases?
- 6. Does the fihensee's radioactive liquid discharge line traverse any non-licensee 4ned property (e.g., it is on a right-of-way surrounded by private properties)z-9 ol 0x
- 7. If the licamce has a discharge pipe that runs underground or any 11E underground piping that carries radioactive liquids, does the licensee perforn monitoring along the discharge pathway to identify potential leakage.
It, Y rS.ý
- I'*. fi-equently is the sampling performed?
Response from Catawba Nuclear Station Phase II (Longer Term Response)
- 8. Historical Onsite Radioactive Contamination:
(a)j Does the licensee have any history of radioactive spills and/or Yes No i leaks outside of buildings/structures?
Are they documented in 10 CFR 50.75g file? 0 0 MR El (b)
Has the licensee identified onsite radioactive groundwater
, .... m ination? See Note 4.
If Yes:
- =: When was it identified - If known:
Dates:
LER/Abnormal Event Report/Conditli n Report Nos:
- . .; => Etas tihe contamination moved outside the El El Restricted area or the owner-controlled are; a
- 9. Comments:
Notes:
(1*) taw6a-has six (6) onsite wells for monitoring the Catawba Landfill. There are also four (4) onsItle wells used for chemical monitoring near the WC Ponds.
(2) The Calwba Landfill wells are sampled semi-annually. The Catawba WC Pond wells have not traditionally been used to monitor .for radionuclides. However, samples from these wells weieOThlected and sent for radioanalysis on March 8 ih 2 0 0 6 .
(3) Infrequient limited sampling has been performed (i.e., rain water and vegetation sampling).
(4) Tritium is a naturally occurring radioactive isotope of hydrogen. It has the samechemical properties as lhydrogen so it exists primarily in the form of Water or water vapor in the air.
When present in the environment. it does not pose an external radiation hazard but is an internal hazard because it can be ingested or inhaled. However, due to its low-energy beta particle and its quick clearance from the body, it must be ingested in very large quantities to pose any significant health risk.
Response from Catawba Nuclear Station The State of South Carolina has established groundwater standards and has defined "contamination" as levels exceeding these established standards. For tritium the relevant standard is the Maximum Contaminant Level of 20,000 pC/I, which has been established as a level of consumption considered protective of human health which would equate to a radiation dose of 4 mrem if an individual were to drink 1/2 gallon of the water every day for a year. The radiation dose limit of 4 mrem is equivalent to about half of the dose received from a typical chest x-ray.
Samples were collected from wells near the Catawba WC Ponds on March 8"' 2006.
Preliminary results indicate the presence of tritium at concentrations well below South Carolina state groundwater standard. Confirmatory sampling and analysis is currently underway to validate the initial sample results. We have no indication that tritium has moved outside the owner controlled area.
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