ML19345D569
| ML19345D569 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 11/24/1980 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Papay L SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 8012160087 | |
| Download: ML19345D569 (1) | |
Text
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- p aarcyg[o UNITED STATES g
E' NUCLEAR REGULATORY COMMISSION o
E REGION V N
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1990 N. CALIFORNIA BOULEVARD o
r-SUITE 202, WALNUT CREEK PLAZA U,
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- o WALNUT CREEK. CALIFORNIA 94596 52 O
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November 24, 1980 Sh 3
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Occket Nos. 50-206, 50-361, 50-362 i
Southern California Edison Company P. O. Box 800 4
2244 Walnut Grove Avenue Rosemead, California 91770 t
Attention:
Dr. L. T. Papay, Vice President Advanced Engineering Gentlemen:
The enclosed Information Notice is provided as an early notification of a possibly significant matter.
Recipients of this notice should review the information for possible applicability to their facilities.
However, no specific action or-response is requested at this time.
If further NRC evaluations so indicate, an IE 4
Circular or Bulletin will be issued to recommend or request specific licensee actions.
If you have questions regarding this matter, please contact this office.
Sincerely, Nye.dA -
l R. H. Engelken Director
Enclosures:
1.
IE Infonnation Notice No. 80-42 2.
Recently Issued IE Information Notices 1
cc w/ enclosures:
J. M. Curran, SCE
- 3. Dietch, SCE I
SSItiS No.: 6835 Accession flo.:
UNITED STATES 8008220261 MUCLEAR REGULATORY CCMMISSION IN 80-42 0FFICE OF INSPECTION AtiD E!!FORCEMEllT UASHIf!GT0!I,D.C.
20555 November 24, *~'1 IE Information flotice tio. 80 42:
EFFECT OF RADIATI0tl GN HYORAULIC SNUBBER FLUID Descriotion of Circumstances:
On August 7,1980, Florida Power Corporation (FPC) filed a report in accordance with 10 CFR Part 21 that identified an uocer service limit of 10 Mrad (megarad) of radiation on the General Electric Versilube F-50 fluid that was provided in Anker-Polth shock suopressors mounted on the reactor coolant pumps.
This upper linit was obtained from the results of a study performed for FPC by Rensselaer Polytechnic Institute (RPI). These results contained two items of prime importance to the operation of the suppressors.
The first result was a significant increase of the viscosity of the fluid to the extent that incipient gelation of the fluid occurred at exposures of approximately 50 Mrad. The viscosity increased linearly for exposures up to 20 Mrad and then increased exponentially for exposures greater than 20 Mrad. The second result showed that nycrochloric acid (ECl) was forned in significant quantities when the fluid was subjected to radiation. The following table lists the dose irradiation time and hcl forteo.
Dose Irradiation hcl Formed-(Mrad)
Time (ppm) 0 2.78 1.2 1 minute 70.3 5.8 5 minutes 329.
5.8 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 335.
18.5 11.2 minutes 555 50.3 15.2 ninutes 1592 One of the recommendations by the RPI personnel was that the fluid be replaced before a limit of approximately 6 Mrads was reached.
FPC reported that the fluid in service at Crystal River flo. 3 plant had absorbed doses tanging from 2.3 to 3.6 Mrads,these values were determined by comparing the viscosity of the fluid in service to that of the test samples at RPI. The Technical Instruction Manual that is provided by the vendor-for these suppressors contains a reconmendation that 12.5 Mrads should be the maximum service life for Versilube F-50.
This IE Information flotice is provided as an early notification of a possibly significant matter that is still under review by the NRC staff.
Recipients should review the infornation for possible applicability to their facilities, fio specific action or response is requested at this time.
If NRC evaluations so indicate, further licensee actions may be requested or required.
Ifl 20-42
!!ovember 24, 1980 Page 2 of 2 No written response to this IE Inforration t'ntice is renuired.
If you have any questions regarding this matter, please contact the Director of the apprcoriate f:RC Peainnal Office.
i 1
2
IN 80-42 November 24, 1980 RECENTLY ISSUED IE IMF0PMATIGM NOTICES Information
. ate or Motice Mc.
Subject Issue Issued to 80-41 Failure cf Swing Check 11/10/30 All power reactor Valve in the Decav Feat facilities with an OL Perovai Syster at Davis-or CP Besse Unit No. 1 80 Failure Of Swina Check 11/10/80 All power facilities
'!alve In The Decay Feat with and OL or CP Fe.cval Systen At Davis-Ecsse Jnit No.1 80-39
- alfunctions Of Solenoid 10/31/80 All light water reactor "alves Panufacturea ey facilities holding laiccr Engineering Corporation power reactor OLs or cps 80-38 Crackino In Charging Pump 10/30/80 All PHR facilities
' sinc Claccing vith an OL or CP i
80-37 Cenicam*ent cooier iecks 10/24/80 All nuclear power anc. reac tor cavi ty facilities holding t'-
ciro at ;ndian Foint cower reactor OLs "ci: 2 cr cps 80-36
,;rn of 5ter.~
10/10/80 All nuclear power Generator Zapport Bolting reactor facilities holding power reactor CLs or cps 80-35 Laakinq end disiccged 10/10/80 All categories G and l
Iodine-121 implant seeds G1 tedical licensees 80-34 Coron cilutien of reactor 9/26/80 All pressurized water l
coolant Guring steam reactor facilities generatcr decontamination holding power reactor OLs 80-33 Ceternination of teletherapy 9/15/80 All teletherapy I
tirer accuracy (G3) licensees l
80-32 Clarification of certain 8/12/80 All NRC and agreement requircnents for Exclu-state licensees sive-use shipments of l
rad' 2r.ive materials l
i
- Operating Licenses or Construction Permits l
l L