ML19257B860
| ML19257B860 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 01/03/1980 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 8001210077 | |
| Download: ML19257B860 (3) | |
Text
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'o UNITED STATES NUCLEAR REGULATORY COMMISSION w
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-t WASHINGTON, D. C. 20$55 January 3, 1980 Docket No. 50-313 Mr. William Cavanaugh, III Vice President, Generation and Construction Arkansas Power & Light Company P. O. Box 551 Little Rock, Arkansas 72203
Dear Mr. Cavanaugh:
As we advised you in our October 26, 1979 letter relating to containment purge and vent valves at Arkansas Nuclear One, Unit No.1, our review of the long term aspects of this issue is continuing.
In order that our review of your long term proposals may continue, you are requested to provide additional information shown in the enclosure.
Please provide the requested information within 45 days of receipt of this letter.
Sincerely, l'bl Q 3
d Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors Enclosure cc: w/ enclosure See next page 1773 154 8001210 0 N
Arkansas Power & Light Company cc:
Phillip K. Lyon, Esq.
House, Holms & Jewell 1550 Tower Building Little Rock, Arkansas 72201 Mr. David C. Trimble Manager, Licensing Arkansas Power & Light Company P. O. Box 551 Little Rock, Arkansas 72203 Mr. James P. O'Hanlon General Manager Arkansas Nuclear One P. O. Box 608 Russellville, Arkansas 72801 Mr. William Johnson U. S. Nuclear Regulatory Commission P. O. Box 2090 Russellville, Arkansas 72801
/^
Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Troy B. Conner, Jr., Esq.
Conner, Fbore & Corber 1747 Pennsylvania Avenue, N.W.
t Washington, D.C.
20006 Arkansas Polytechnic College Russellville, Arkansas 72801 Director, Bureau of Environmental Health Services 4815 West Markham Street Little Rock, Arkansas 72201 1773 155
Enclosure RE00EST FOR ADDITIONAL INFORMATION FOR CONTAINMENT PURGE SYSTEM AND CONTAINMENT VENTING SYSTEM FOR ARKANSAS NUCLEAR ONE, UNIT 1 DOCKET NO. 50-313 Please discuss how your design conforms with each of the following criteria:
1.
The bypass controls should have sufficient physical features to facilitate adequate administrative control.
Describe the inherent features provided for your emergency core cooling systems. Where physical features are not present, state your intention to include these features.
2.
System level annunciation shall be made when a bypass is active.
Describe your provisions for annunciation when a emergency core cooling system is bypassed.
If annunciation is not provided at the system level, state your intention to include these features.
3.
Diverse signals should actuate closure of the containment isolation valves.
Specifically, a minimum of (1) containment high radiation, (2) safety injection actuation, and (3) containment high pressure are required. All of these signals should be derived from safety grade equipment.
Your system apparently acts only on high containment pressure.
Justify your present design or describe your intentions to correct these deficiencies.
4.
Clarify the discrepancy between your response to our generic letter of November 28,1978 (with regard to bypasses) and FSAR Section 7.1.3.2.
We are concerned because a block, as described in your FSAR, is a bypass as defined by our generic letter.
1773 156