ML20033C560
| ML20033C560 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 12/01/1981 |
| From: | Barker J SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Chandrasekran Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20033C554 | List: |
| References | |
| NUDOCS 8112030423 | |
| Download: ML20033C560 (5) | |
Text
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SOUTH CAROLINA ELECTRIC & GAS COMPANY Post orrict sox 7e4 COLUMBI A, S. C. 29218 December 1, 1981 Mr. ihyagaraja Chandrasekran O' rice of Nuclear Reactor Regulation U. S. NRC Washington, DC 20555
Dear Chandra:
Attached is my suggested rewording of the settling pond tech spec and its basis.
My changes basically keep the unit of activity as the microcurie rather thar.
introduce the picocurie and acknowledge the fact that the density of the drained slurry is about 1 gm/ml. The implication is that for the purpose of fulfilling the tech-spec requirement on applicant need onic count wet drained slurry in a standard for him liquid counting configuration and use his standard analysis programs.
I think these changes are in agreement with the discussion I had with Jack Bagley.
If there are any problems, please contact me.
Sincerely, h%/
G4 %
James Barker, PhD Staff Health Physicist JB:tdh Attachment g2go l
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(0 RADI0 ACTIVE EFFLUENTS BASES
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3/4.11.1.3 LIQUID WASTE TREATMENT The CPERABILITY of the liquid radwaste treatment system ensures that this system will be available for use whenever liquid effluents require trea+.ma.nt prior to release to the environment. The requirement that the appropriate portions of this system be used when specified provides assurance that the releases of radioactive materials in liquid effluents will be kept "as low as is reasonably achievable." This specification implements the requirements o#
10 CFR Part 50.36a, General Design Criterion 60 of Appendix A to 10 CFR Part 50 and the cesign objective given in Section II.D of Appendix I to 10 CFR Part 50.
The specified limits governing the use of appropriate portions of the liquid radwaste treatment system were specified as a suitable fraction of the dose design objectives set forth in Section II.A of Appendix I, 10 CFR Part 50, for ifquid effluents.
3/4.11.1.4 LIOUID HOLCUP TANKS Restricting the quantity of radioactive material contained in the specified tanks provides assurance that in the event of an uncontrolled release of the tanks' contents, the resulting concentrations woold-te less than the limits of f
10 CFR Part 20, Appendix B, Table II, Column 2, at the nearest potable water L
supply and the nearest surface water' supply in an unrestricted area.
Qi 3/4 11.'. 3 SETTLING PCNDS inventory limits of the settling poncs (SP) are based on lim'iting the -
conse., s ces.of.an uncontrolled.alease of the pond inventory. The*expressito in.5pez 'ication 3.11.1.5 assumes the pond inventory is unifor=1y mixed, that the pond is located ir. an uncontrolled area as defined in 10 CFR 20, and that the concentration limit in Note 1 to Appendix B of 10 CFR 20 applies.
The batch limits of slurry to the chemical treatment ponds assure that radioactive material in the slurry transferred to the SP are "as low as is reasonably achievable" in accordance with 10 CFR 50.36a. The expression _ in Specification 4.11.1.5 assures no batch of slurry will be transferred to the SP unless the sum of the ratios of the activity of the radionuclides to their respective concentration Ifmitation is less than the ratio of the
- 10 CFR 50, Appendix I, Section II. A, total body level to the 10 CFR 20,105(a),
- whole' body dose limitation, or that:
C 3 mrem /yr I J, 500 mrem /yr = 0.006 jC 3
where c) = radioactive slur y concentration for radion clide "j" entering the unrestricted area SP, in microcuries/miDiliter C
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RADI0 ACTIVE EFFLUENTS "1"
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- D BASES 3/4 11.1.5 SETTLING PONDS (Continued)
Cy = 10 CFR 20, Appendix B, Table II, Column 2, concentration for single radionuclide "j", in microcuries/ milliliter.
For the design of filter /demineralizers using powder resin, the slurry wash volume and the '.eight of resin used per batch is fixed by the cell surface area and the slurry volume to resin weight ratio is constant at 100 milliliters / gram of wet, drained resin witi. a moisture content of approximately 55 to 60% (bulk density of about 58 pounds per cubic feet). Therefore, C) 10' ml/gm)G0" pCi/rCil
<,6 9 hl*"i I
J pCi/m f
j m e. tN. terms are defined in Specification 4.11.1.5.
76Seh Sinq [cc wN dimak sIauj 4a clonse'kg ik 1 Wmf Qht1{p a&gnyhen C.
Yi VLC N 6 C
-for Y-ractac6 is os.safall rlut 4 uoair, ou can t
& Y4. tU V f l'S GS
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c-d the incivicual wiii ce sui iu c....,
' atmospheric diffusion factor above that for the site boundary.
release rate limits restrict, at all times, the corresponding gamma anc ceta dose rates above background to an individual at or beyond the site bounc*ar9y to less than or equal to 500 mrem / year to the total body or to less than or equal to 3000 arem/ year to the skin. These release rate limits also restrict, at all times, the corresponding thyroid dose rate above background to an infant via the cow-milk-infant pathway to less than or equal to 1500 mrem /
year for the nearest cow to the plant.
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SUMMER - UNIT 1 8 3/4 11-3
~m RADIOACTIVE EFFLUENTS
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SETTLING POND LIMITING CONDITION FOR OPERATI0fl 3.11.1.5 The T;Uaitity of radioactive material contained In each settling pond shall be limited by the following expression:
A h *.f
< 1.0 excluding tritium and dissolved or entrained noble gases, where, Aj = Pond inventory limit for single.radionuclide "j", in curie.
Cj = 10 CFR 20, Appendix B, Table II, column 2, concentration for single radionuclide "j", microcuries/ml.
V = design volume of liquid and slurry in the pond, in gallons.,
264 = Conversion unit, microcuries/ curie per milliliter / gallon.
APPLICABILITY: At all times.
ACTION:
N a.
With the quantity of radioactive material in the settling pond exceeding the above limit, immediately suspend all additions of radioactive material to the pond and within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> reduce the pond contents to within the limit.
b.
The provisions of specifications 3.0.3 and 3.0.4 are not applicable.
SURVEILLANCE REQUIREMENTS 4.11.1.5 The quantity of radioactive material contained in each batch of slurry (used powdex resin) to be transferred to the settling ponds shall be detersined to be within the above limit by analyzing a representative sample of the slurry, and batches to be transferred to the settling ponds shall be limited by the expression:
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L RADI0 ACTIVE EFFLUENTS j j SURVEILLANCE REQUIREMENTS (Continued)
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wher's
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N = concentration of radioactive materials in wet, drained slurr'y (used J
powdex resin) for radionuclide "j" excluding
- fue, dissolved or entrained ncble gas and radionuclides with than 8 day half-life.
TheanalysisshallincludeatleastCe-l'44,Cs-134,Cs-137,,llsl'ite Sr-89, Sr-90, Co-58 and Co-60 in ;'---- -f r:/;
2 ns scro carisc /mi
$'re Can'ss /g M e >
,'I j = 10 CFR 20, Appendix B, Table II column 2 concentration for single radionuclide "j", in microcuries/ milliliter.
.t. Lc
.1 IEs & a s
<f Sr.9% s r /o bdch conc.c.dwfEs c
su b.c Ec!dk bas,cl on rb most raud/p Vtvallabl+ mostlt/p compsif( aul sti.
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