ML20235K920
| ML20235K920 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/16/1989 |
| From: | Poslusny C Office of Nuclear Reactor Regulation |
| To: | Tison Campbell ARKANSAS POWER & LIGHT CO. |
| References | |
| GL-87-06, GL-87-6, TAC-71972, NUDOCS 8902270300 | |
| Download: ML20235K920 (5) | |
Text
.
- February 16, 1989
- c Docket No. 50-313 Mr. T. Gene
- Campbell
'Vice. President, Nuclear Operations Arkansas Power end Light Company Post Office' Box-551 Little Rock,' Arkansas -72203
Dear Mr. Campbell:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - HIGH PRESSURE s
INJECTION BACKFLOW EVENT, ARKANSAS NUCLEAR ONE, UNIT 1-(ANO-1) (TAC N0. 71972)
We'have reviewed your submittal dated February 14, 1989, concerning your evaluation of the ANO-1 High Pressure Injection System (HPI) backflow event of January 20,l1989, and find that we need additional information to complete our
- evaluation of proposed fixes precipitated byLthe event. The enclosed questions focus on the reactor coolant system pressure boundary,-proposed testing of HPI valves, and HPI low temperatureLpiping line instrumentation monitoring. We request that this information be provided within 7 days of receipt'of this letter, as discussed with your staff.:
The reporting and/or'recordkeeping requirements of this letter affect fewer than ten respondents; therefore, OMB. clearance is not required under P.L.96-511.
Sincerely,
/s/
Chester Poslusny, Jr.
Project Manager Project Directorate - IV Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page DISTRIBUTION.
(Docket-File ~ "
NRC PDR Local PDR PD4 Reading i
L. Rubenstein J. Calvo P. Noonan C. Poslusny OGC-Rockville E. Jordan B. Grimes ACRS (10)
T. Marsh W. Hodges 804 Plant File
- SEE PREVIOUS CONCURRENCES:
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7 Docket No. 50-313 Mr. T. Gene Campbell -
Vice President, Nuclear
/,
Operations Arkansas Power and Light Company Post Office Box 551 1
Little Rock, Arkansas. 72203
Dear Mr. Campbell:
SUBJECT:
' REQUEST FOR ADDITIONAL INFORMATION - HIGHf ESSURE INJECTION BACKFLOW EVENT, ARKANSAS NUCLE R ONE, UNIT 1_(AN0-1) (TAC NO. 71972)
~
- We have reviewed your submittal. dated Februar 14; 1989, concerning your evaluation of-the ANO-1 High Pressure Injec fon System (HPI) backflow event of January 20, 1989, and find that we need ad itional information to complete our evaluation of proposed fixes precipitate by the event. ~ The-enclosed questions focus on the reactor coolant system pr > sure boundary, proposed testing of HPI
. valves, and HPI low temperature pipin line instrumentation monitoring. We request that this information be pr ided within 7 days of receipt of this letter.
The reporting.and/or recordkeep g requirements of this letter affect fewer than ten respondents; therefor, OMB clearance is not required under P.L.96-511.
Sincerely, Chester Poslusny, Jr., Project Manager Project Directorate - IV Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/enclos e:
See next p c DISTRIBUT'ON Docket ile NRC PDR Local PDR PD4 Reading L. Rub nstein J. Calvo P. Noonan C. Poslusny 0GC-R ckville E. Jordan B. Grimes ACRS (10)
T._ Marsh J. Craig W. Hodges PD4 Plant File PD LA, PD4/PM PD4/D MEBM L
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February 16, 1989 i
Docket No. 50-313.
1 i
Mr..T. Gene Campbell j
Vice President, Nuclear Operations.
Arkansas Power and Light Company Post Office Box 551 Little Rock, Arkansas 72203
Dear Mr. Campbell:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATI0ft - HIG'H PRESSURE INJECTI0tl BACKFLOW EVENT, ARKANSAS NUCLEAR ONE, UNIl 1 (ANO-1) (TAC.NO. 71972)
We have ' reviewed your submittel dated February 14, 1989, concerning your evt.luation.of the ANO-1 High Pressure Injection System (MPI): backflow event of
. Ja nua ry 20, 1989, and find that we need additional information to complete our evaluation of proposed fixes precipitated by the event. The enclosed questions focus on the reactor coolant system pressure boundary, proposed testing of HPI valves, end HPI low temperature piping line' instrumentation monitcring. We request that this-information be provided within 7 days of receipt of this letter, as discussed with your staff.
The reporting and/or recordkeeping requirements of this letter affect fewer then ten respondents; therefora. OMB clearance is not required under P.L.96-511.
Sincerely, h
Chester Poslusny, Jr., Project Manager Project Directorate - IV Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page
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l Mr. T. Gene Campbell' Arkansas, Power & Light' Company Arkansas. Nuclear One, Unit 1 -
CC:
Mr. Dan R.: Howard, Manager Licensing Arkansas Nuclear One P. O. Box 608 Russellville, Arkansas 72801-Mr. James M. Levine,. Executive Director Nuclear Operations Arkansas Nuclear One P.'O. Box 608 Russellville Arkansas 72801 Mr.' Nicholas S. Reynolds Bishop, Cook, Purcell & Reynolds
'1400 L Street, N.W.
Washington, D.C.-
20005-3502 Mr.. Robert B. Borsum Babcock &-Wilcox-Nuclear Power Generation Division 1700 Rockville Pike, Suite 525 Rockville, Maryland 20852 Resident Inspector U.S. Nuclear Regulatory Commission 1 Nuclear Plant Road Russellville, Arkansas 72801 Regional Administrator, Region IV U.S. Nuclear Regulatory Comnission Office of Executive Director for.0perations 611.Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Honorable William Abernathy County Judge of Pope County Pope County Courthouse Russellville, Arkansas 72801 Ms. Greta Dicus, Director 4
Division of Environmental Health Protection Arkansas Department of Health 4815 Wost Markam Street Little Rock, Arkansas 72201 1
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ENCLOSURE I
Arkansas Nuclear One, Unit 1
)
HPI Backflow Event j
Request for Additional Information 1.
Provide a markup of Figure 2 of the February 14, 1989 submittal indicating i
the location of the reactor coolant system pressure boundary for the HPI
)
lines.
2.
Are any valves in the HPI lines considered to be pressure isolation valves according to the definitior in NRC Generic Letter 87-06?
3.
What valves in the HPI lines protect the low pressure suction piping from the reactor coolant system pressure?
4.
What valve testing is being periodically performed to provide assurance that the low pressure suction piping (HPI) will not be exposed to the reactor coolant system pressure?
5.
For the HPI leak rate testing proposed in your 2/14/89 submittal what is the leak rate limit that will be used?
6.
For the short term, describe how frequently the proposed HPI piping temperature instrumentation will be monitored during routine operations, and following each time HPI system injection occurs and the check valves are challenged.
7.
For the HPI low temperature piping, what temperature limits would require operator action to mitigate damage to the system caused by check valve leakage or failure?
8.
Given that an established HPI piping temperature limit was exceeded and identified, what specific actions would be taken by the operator in the short term to correct the overtemperature condition? What actions would be taken for the long-terr:? How would these special procedures be docun,ented/ implemented?
9.
A stronger commitment is needed to install control room temperature indication / alarm for monitoring the HPI system low temperature piping lines.
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