ML20003F314
| ML20003F314 | |
| Person / Time | |
|---|---|
| Site: | Framatome ANP Richland |
| Issue date: | 02/02/1981 |
| From: | Estey H SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER |
| To: | Shum E NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 18398, NUDOCS 8104200583 | |
| Download: ML20003F314 (3) | |
Text
70-/Ar7 9/DL EkON NUCLEAR COMPANY,Inc.
1101MunRnakirA6af F. 2 Shr IJR Achnd Washaw.it'2 g.,, J,0 Phone: ($09) 375-8100 Telex: 15-2878 Eg ic 5'5
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E. Y. Shum p
Uranium Process Licensing Section Docy-- D
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Uranium Fuel Licensing Branch USNRC
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Material Safety FEB 111981 > ;
U.S. Nuclear Regulatory Comission
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Gentlemen:
Reference:
Your letter of October 8,1980 My letter of January 30, 1981 Enclosed are two copies of two corrected pages of Exxon Nuclear's responses to cements and questions of section 6 of the enclosure to your October 8, 1980 letter.
Sincerely,
. Paul stey, Manager Licensing & Compliance, Operating Facilities HPE:cic egr s.9 S
cc: Dr. F. Wimpey 4
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e,' O?ju_ 7"7 1710 Goodridge Drive P.O. Box 1303 O/A 7f '
McLean, VA 22102 (with 3 copies of 4
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Am AmWATE OF EXXON COAPORATION 810.42o0573 C
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- 6. 9 Ccmen:
Test vella 2 crd 3 have shcun the presence of fluoride, nitrate and sulfur.
Test vella 10, 4, S, c'nd G have irdica:ed the presence of nitrate and well 7 the presence of sulfur.
The precimity of these veils :o the :ce of the dikes (eccept number 10) and the distance separating them poses the possibility of narrcu conr~~.r*nant plw es (narrou d:se :o the shar distances from possible release points) migrc:ing, undetected, be:ueen the test velia chng the eastern side of the hgoons.
Can ycu describe the likelihood cr prchability of :he well sys:em detec:ing lecks ass:cr:ng the :qgrade be:ueen lines system d:es not vork?
Resconse First, the "between-liners leak monitoring system" does work; a defect in the upper Hypalon liner of lagoon no. 2 was detected by the respective leak monitoring system.
Second, since the fluoride, nitrate and sulfate are intimately mixed in the lagocn system, the detection of one of these chemical characteristics in the groundwater should be acccmpanied with detection of the other chemical characteristics if the source of contamination is of lagoon origin. This has been shown to be the case in instances of positive (chemically contaminated) groundwater samples followed by the detecticn of holes in lagccn liners during ensuing investigations.
Infernation and data presented in our respense to questien no. 6.8, above, tupport our position that the groundwater flow in the ENC
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lagcon area is to the north. With the installation of test wells no.14 and 15 in September,.1380, we now have five test wells north of the lagoon system.
It is felt that the existing system of test wells will detect any leaks from the lagoons.
G.10 Co men Cescribe the be:ceen lines detec:icn sys:em of 9:e current icgccns.
Vna: remedial ac:-kn vill be :,cken if ieckc;e is de:ected in the lagccn(s)? Cescribe hou te porary s: crc;e vill be provided in case liquid has to be pumped from lagocn(s) for lagocn repair.
l Resoonse l
l The "between-liners" leak detection system for monitoring the integrity of the upper liners of the chemical waste storage lagoons consists of sampling heads embedded in sand layers between the t
upper and lower Hypalon liners. The heads are connected to tubing that extends to the top of respective lagoon banks.
Sampling head construction details are shown in Figure 6.10-1.
Sampling head emplacement configurations in the respective lagcons are shewn in Figures 6.10-2, -3 and -4 (attached),
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l m G e-e w-e-6=m e-e+
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At least quarterly, a vacaum is drawn on each sampling head.
If liquid is obtained from a sampling head, it is analyzed for fluoride content. The following investigative action would be initiated in the event that a significant quantity of liquid with a fluoride concentration of more tnan 3 mg/t should be pumped from any between-liner sampling head.
Determine the lower Hypalon liner integrity by: activation of the sampling heads located be' ween the lower Hypalon liner and t
the original Petromat liner of lagoons 1 and 3 (4 sampling heads for each of these two lagoons); sampling the 3 dry wells associated with the " French Drains" located under the lower Hypalon liner of lagoon 4; maximum utilization of the lagoon test well system.
If a significant leak is detected in the upper liner of a lagoon, it will be scheduled for repair, expeditiously.
1.iquid waste from the. leaking lagoon would be pumped into the other lagoons. Our normal practice is to maintain the liquid level in each lagoon at (or below) the " safe operating level".
In this manner, there is normally s2 feet of unused storage capacity in each lagoon which would be available in the event (as has been experienced) that a lagoon had to be removed from service, emptied, cleaned and repaired.
6.11 Ccmen:
W.at re: cdia: :::icn :,r::~ be r4 ken to c:ecn :o cen'ananta in grcur.E.:cter due to : ;ocn ie: b ge in the pca:?
Resconse None. With the groundwater flow being to the north and then east where similar chemical contamination currently exists from other sources, and where there are no drinking water wells, we feel that no remedial action beyond that which has already taken in providing better lagoon liner and leak monitoring systems is warranted.
6.12 Coment Descdbc rhe proposed additional monitor valla to be installed and the adequa:y of the overalt monitanng uelt system :o define the contaminant ptwne in grounducter systems.
Response
Figure 6.12 (attached) shows the additional test wells (nos.rl4%
and 15), as well as the.other 13 test wells, in relation to the lagoon system. This figure is drawn to scale, and pertinent' distances are shown in this figure.
(The test well locations shown in Figure 1S'23 2