ML19326D835
| ML19326D835 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 06/23/1980 |
| From: | Novak T Office of Nuclear Reactor Regulation |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 8007030371 | |
| Download: ML19326D835 (3) | |
Text
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- p8 "849 UNITED STATES E
NUCLEAR REGULATORY COMMISSION e
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j wasmNGTON, D. C. 20555
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June 23, 1980 Docket No. 50-313 Mr. William Cavana. ugh, III Vice President, Generation and Construction Arkansas Power & Light Company P. O. Box 551 Little Rock, Arkansas 72203
Dear Mr. Cavanaugh:
In our review of the proposed Appendix I Technical Specifications for Arkansas Nuclear One, Unit No.1 (ANO-1) and in our discussions with your staff on this issue we have become concerned about the present operability status of the ANO-1 waste gas system. Accordi.ngly, we request the information identified in the enclosure within 30 days on
~
receipt of this letter.'
Sincerely,
)homasM.Novak,AssistantDirector b
T s
for Operating Reactors Division of Licensing
Enclosure:
Request ~ for Additional Information cc w/ enclosure:
See next page l
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8 007080 j ej}
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Arkansas Power & Light Company ccw/ enclosure (s):
Mr. David C. Trimble Director, Technical Assessment Manager, Licensin9 Division Arkansas Pcwer & Light Company P. O. Box 551 Office of Radiation Programs (AW-459)
Little Rock, Arkansas 72203 U. S. Environmental Protection Agency Mr. James P. O'Hanlon Crystal Mall #2 General Manager Arlington, Virginia 20460 Arkansas Nuclear One P. O. Box 608 U. S. Environmental Protection Agency Region VI Office Russellville, Arkansas 72801 ATTN:
EIS COORDINATOR 1201 Elm St'reet Mr. William Johnson U. S. Nuclear Regulatory Commission First International Building P. O. Box 2090 Dallas, Texas 75770 Russellville, Arkansas 72801 Mr. Robert B. Borsum Babcock & Wilcox Director, Bureau of Environmental Health Services Nuclear Power Generation Division 4815 West Markham Street Suite 420, 7735 Old Georgetown Road Little Rock, Arkansas 72201 Bethesda, Maryland 20014 Troy B. Conner, Jr.
Esq.
Conner, Moore & Corber 1747 Pennsylvania Avenue, N.W.
Washington,8D.C.
20006 Arkansas Polytechnic College Russellville, Arkansas 72801 Honorable Ermil Grant Acting County Judge of Pope County Pope County Courthouse Russellville, Arkansas 72801 Mr. Paul F. Levy, Director Arkansas Department of Energy 3000 Kavanaugh Little Rock, Arkansas 72205 l
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REQUEST FOR ADDITIONAL INFORMATION Enclosure CONCERNING THE WASTE GAS SYSTEM FOR ARXANSAS NUCLEAR ONE, UNIT NO. 1 1
DOCKET NO. 50-313 1.
Per previous telephone conversations it was the NRC staff's understanding that Arkansas Power and Light Company (AP&L) was about to complete a thorough evalua-tion of the ANO-1 waste gas system. Provide the detafis of the findings of this evaluation, the proposed changes or modifications which are planned, the schedules for implementation of the changes and the expected operating results of the changes.
2.
Provide an operational description of the hydrogenated portion of the waste gas system (i.e., the. surge tank / decay tank train) and the performance his-l tory of the waste gas system, specifically addressing the following:
4 -
a.
oxygen and hydorgen levels - design versus actual b.
waste gas holdup times - design versus actual c.
system availability d,
problem arns e.
modification history.
- 3.. Per the ANO-1 FSAR, aerated gases are separated from all gases associated with primary ::ystem water (which contains hydrogen gas) to prevent the forma-tion of an explosive mixture anywhere in the gaseous waste system.
In this regard, provide the following information:
a.
the means available for monitoring (or measuring) the oxygen concentration at specified locations in the system b.
monitoring (measuring) frequency
- c.. means available for corrective action, requirements for taking corrective action, and history of any such past action d.
in lieu of oxygen monitoring capabilities to demonstrate that explosive mixtures do not exist anywhere in the system, provide analyses to this effect.
j i
If oxygen levels in the waste gas system have been, or are suspected of having been, higher than trace levels (say greater than 100 ppm), please provide the following information, in order that we may perform our own evaluation of the potential for a hydrogen explosion, specifically addressing the following points:
a.
sources of oxygen inleakage b.
data 'taken to evaluate this problem c.
actions taken to insure that explosive conditions do not exist within the system d.
what assurance do you have that explosive conditions do not exist at the local points of air inleakage; particularly at the degasifier/ waste gas system interface e.
what corrective actions have been taken, to dat, to minimize oxygen in-leakage into the system j
l f.
what corrective actions are planned in this regard, and provide a schedule for their implementation.
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