ML20137F799
| ML20137F799 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 01/12/1988 |
| From: | Liza Cunningham Office of Nuclear Reactor Regulation |
| To: | Tam P Office of Nuclear Reactor Regulation |
| References | |
| TAC-M65106, NUDOCS 9704010220 | |
| Download: ML20137F799 (2) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION f / /)
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JAN 121988
.a Docket No. 50-334 MEMORANDUM FOR:
Peter 5. Tam, Project Manager Project Directorate I-4 Division of Reactor, Projects I/II Office of Nuclear Re'attor Regulation FROM:
LeMoine J. Cunninghqp3, $(lieg p.3 c,'
Radiation Protection Branch Division of Radiation Protection and Emergency Preparedness Office of Nuclear Reactor Regulation
SUBJECT:
BEAVER VALLEY UNIT 1 WASTE GAS DECAY TANK MONITOR:
REQUEST FOR ADDITIONAL INFORMATION (TAC #65106)
We have reviewed Duquesne Light's supplemental inf ormation dated December 2, 1987 regarding monitors for the Waste Gas Decay Tank (WGDT).
While Duquesne Light responded to all of our questions, we find that the response to question 4 does not contain enough information for us to complete our evalua-tion.
Enclosed is a request for additional information regarding question 4.
nl J L-Letioine J. Cunningham ief ram ation Protection Branch Division of Radiation Protection and Emergency Preparedness Office of Nuclear Reactor Regulation l
Enclosure:
As Stated l
010625 3/6
Contact:
Edward F. Branagan, Jr.
x24905 l
8 9704010220 880112 PDR ADOCK 05000334 P
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BEAVER VALLEY UNIT 1 TECHNICAL SPECIFICATION CHANGE REGARDING WASTE GAS DECAY TANK MONITOR:
REQUEST FOR ADDITIONAL INFORMATION 1
1.
In proposed TS 4.11.2.5.1 (Ref.1) it is stated that:
"The quantity of radioactive material contained in each gas storage tank shall be determined to be within the above limit at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> when radioactive materials are being added to the tank.
Performance of this surveillance is required when the gross concen-tration of the primary coolant is > 100 pCi/ml."
i In Ref. 2 (Item 4(c)), Duquesne Light provided information regarding the basis for the value of 100 microcuries/ml.
However, Ref.2 did not explain the link between the estimated concentrations of gases in the WGDTs (i.e.,
361 microcuries/cc for Beaver Valley Unit-1) and the gross concentration in the primary coolant.
Provide an analysis that shows that when the gross concentration of radionuclides in the primary coolant is less than j
or equal to 100 microcuries/ml, then:
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(a) The quantities of radioactive gases in each tank is less than or equal to 52,000 Ci of noble gases (i.e., TS 3.11.2.5); and (b) In the event of an uncontrolled release of the tanks' contents, the resulting total body exposure to an individual located at the nearest exclusion boundary for two hours immediately follow-ing the onset of the release will not exceed 0.5 rem (see Bases 3/4.11.2.5, page B 3/4 11-5).
j References 1.
Letter from J. D. Sieber, Duquesne Light, to USNRC, dated April 13, 1987.
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2.
Letter from J. D. Sieber, Duquesne Light, to USNRC, dated December 2, 1987.