ML17297A741
| ML17297A741 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/21/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Tedesco R Office of Nuclear Reactor Regulation |
| References | |
| ANPP-18722-JMA, NUDOCS 8109010213 | |
| Download: ML17297A741 (8) | |
Text
REGUL
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ACCESSION NBR:810 F AC ILi:STN-50-528 STN"50 529 STN"50 530 AUTH'Ai4lE VAN BRUiVTP E~, E ~
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Palo Verde Nuclear Stati one Unit 1P Arizona Publi 05 Palo Verde, Nuclear Stationi Unit 2i Arizona Publi 05000529 Palo Verde Nuclear StationP Unit 3r Arizona Publi 05000530 AUTHOR AFFILIAT'ION Arizona Public Service Co, RECIPIENT AFFILiIAT'ION Assistant Director for Licensing
SUBJECT:
Forwards util response'o Question 460. 19 of NRC 810714 ltr re liquid radwaste tank failure accident,No ground contaviination would occur in event of failure.Responsel will be incorporated into future amend to FSAR.
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ARIZONANUCLE~POWER PROJECT Post Office Box 2166~oenix, Arizona 85036 August 21, 1981 ANPP-18722 JMA/WFQ Mr. R. L. Tedesco Assistant Director for Licensing Division of Licensing U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555 Subj ect:
Palo Verde Nuclear Generating Station (PVNGS) Units 1, 2 and 3
Docket Nos.
STN-50-528/529/530 File:
81-056-'26';1;10
Reference:
Letter R. L. Tedesco, NRC, to E. E. Van Brunt, Jr.,
Dated July 14, 1981;
Subject:
Request for Additional Information PVNGS
Dear Mr. Tedesco:
Attached is our response to question 460.19 (ETSB) of the referenced letter.
This response will be incorporated in a future FSAR amend-ment.
Very truly yours, EEVBJr/WFQ/pc Attachment E.
E. Van Brunt, Jr.
APS Vice President, Nuclear Projects ANPP Project Director cc:
J. Kerrigan (w/a)
P. Hourihan A. Gehr goo~
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4 Mr. R. L. Tedesco August 21, 1981 Page Two STATE OF ARIZONA
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COUNTY OF MARICOPA )
I, Edwin E. Van Brunt, Jr., represent that I am Vice President Nuclear Projects of Arizona Public Service Company, that the foregoing document has been signed by me on behalf of Arizona Public Service Company with full authority so to do, that I have read such document and know its contents, and that to the best of my knowledge and belief, the statements made therein are true.
Edwin E. Van Brunt, Jr.
Sworn to before me this Zi'ay of 1981.
Notary Public
'Pj My Comi&ssion expires:
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QUESTION 15A.49 (NRC No. 460.19) 15.7 We are currently evaluating the liquid radwaste tank failure accident for Palo. Verde Nuclear Generating Station (PVNGS) Units 1, 2 and 3.
Based on our evaluation, we have concluded that the tank most likely to result in the highest levels of concentrations in the release in the event of tank failure is the concentrate monitor tank which is located in the radwaste building at El. 100'on grade) and has a capacity of 4000 gallons when filled to 80 percent of its capacity (see Figure 1.2-5,
Our calculations show that either a dilution factor of 3 x 10 or a transit time of approximately 718 years will be required in order to ensure that the radionuclide concentrations at the applicable location are well below the 10 CFR Part 20 limits.
Please indicate whether such values can be expected at the applicable location for PVNGS and, if not, what dilution factor and transit time can" be expected at the applicable location.
RESPONSE
The concentrate monitor tanks are located inside the radwaste building.
In the event of failure, all leakage would be contained by curbs and floor drains and pumped (by sump pumps) for holdup and/or processing.
Accordingly, no ground contamination would occur.
The concentrate monitor tank gaseous inventory is expected to be very small (refer to FSAR Table 12.2-5).
Thus, radiological impact due to concentrate tank failure is projected 'to be less than that of the refueling water tank (RWT) as noted in FSAR Sections 15.7.3.3 and 15.7.3.4.
The RWT has the highest liquid and gaseous inventories and concentrations of any out-side tank.
Dilution factors and transit times for the perched water and regional aquifer for failure of the RWT are presented in FSAR Section 2.14.13.3.
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