ML20035F131
| ML20035F131 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 02/11/1993 |
| From: | Minners W NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Gillespie F NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| Shared Package | |
| ML20035B116 | List: |
| References | |
| REF-GTECI-106, REF-GTECI-NI, TASK-106, TASK-OR NUDOCS 9304200305 | |
| Download: ML20035F131 (2) | |
Text
.
4 l
Enclosure l
- f. m c l
s
.s l.
! h.,,.gr
'n UNITED STATES 3 y (JJ4 /4,i NUCLEAR REGULATORY COMMISSION I
S, $2 WASHINGTON, D.C. 20555 g
y wy FEB 1 ! 1993.
/
MEMORANDUM FOR:
Frank Gillespie, Directer Program Management, Policy Development and Analysis Staff Office of Nuclear Reactor Regulation FROM:
Warren Minners, Director Division of Safety Issues Resolution Office of Nuclear Regulatory Research
SUBJECT:
FIVE HUNDRED GALLON PROPANE TANK AT DUANE ARNOLD As part of the work on Generic Safety Issue 106 (GSI-106), " PIPING AND THE USE 0F HIGHLY COMBUSTIBLE GASES IN VITAL AREAS," INEL made a scoping study of the risk associated with the use of hydrogen storage facilities for the volume control tank at PWRs and the main electric generators at PWRs and BWRs.
Some of the information from this study came from the responses of the regional l
offices to the memorandum of May 28, 1989 from T. Murley that requested i
information regarding hydrogen capacity and distances to safety-related structures and air intakes (Ref.1).
l The response from Region III in the May 10, 1989 memorandum from E. Greenman (Ref. 2) notes the identification by the resident inspectors of a 500 gallon I
tank of propane that is located about 25 feet from the turbine building at the Duane Arnold plant. This memo also notes that the plant diesel generators and their lube and fuel oil supplies are located in the turbine building.
LPG l
supplies such as this were not in the scope of GSI-106, but were covered in Licensing Issue 136, " Storage and the Use of Large Quantities of Cryogenic l
Combustibles" (Ref.3). Although this plant was not evaluated formally in GSI-106, we note that one scenario of interest is a seismic event which causes l
loss of offsite power because of failure of the ceramic insulators on the station transformer.
This event could also cause a failure at this LPG supply that results in loss of the diesel generators and station blackout.
Possible failure mechanisms include ingestion of a flammable mixture at an air intake, leakage into the turbine building and subsequent fire / explosion, or direct blast damage.
l l
In view of the short separation distance and large supply, NRR may want to consider looking more closely at this risk for the Duane Arnold Plant. An l
analysis for the Dresden plant, involving a 250 gallon tank of propane located l
l 9304200305 930412 PDR ADOCK 05000331 P
PM l
N
' FEB 1 1 1093 I
I about 300 feet from an air intake, is given in reference 4.
This analysis was used as part of the basis for the resolution of Licensing Issue 136.
[
i 9
Z4t%
H Warren Minner Director Division of Safety Issues Resolution Office of Nuclear. Regulatory Research'.
}
cc:
C. McCraken i
P. Madden i
References:
l 1.
Memorandum from T. Murley to NRC Regional Staff, i
" Hydrogen Storage on the Roof of the Control Room,"-
May 2, 1989.
j 2.
Memorandum from E. Greenman to C. McCraken, Hydrogen l
Storage on the Roof of the Control Room," May 10, 1989.
3.
NUREG-0933, "A Prioritization of Generic Safety Issues" and Amendments, Initial Issue December,1983.
4.
Memorandum for D. Crutchfield from W. Johnston, "Dresden 2/3 Use of Liquid Petroleum Gas (LPG) for the Mobile Volume '
j 4
Reduction System (MVRS) to be Used for Radioactive Materials,"
November 1,1985.
l
?
l I
i i
.