ML19345D571
| ML19345D571 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 11/24/1980 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Withers B PORTLAND GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 8012160092 | |
| Download: ML19345D571 (1) | |
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UNITED STATES cj j
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NUCLEAR REGULATORY COMMISSION o
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1990 N. CALIFORNIA BOULEVARD
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SUITE 202, WALNUT CREE K PLAZA
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.1 llovember 24, 1980 M
c2 is backet No.50-34J Portland General Electric Company 121 S. U. Salmon Street
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Portland, Oregon 97204 Attention:
Mr. Bart D. Withers Vice President I;uclear Gentlemen:
The enclosed Information Notice is provided as an early notification of a possibly significant matter.
Recipients of this notice snould review the information for possible applicability to their facilities.
However, no specific action or response is reque ted at tHs time.
If further NRC evaluations so indicate, an IE Circular or Bullet 1.' will be issued to recommend or request specific licensee actions.
If you have questions regarding this matter, please contact this office.
Sincerely, k[N5.,.Cb-R. H. Engelken Di rector
Enclosures:
1.
IE Information flotice I:o. 80-42 2.
Recently Issued IE Information Iotices cc w/ enclosures:
C. P. Yundt, PGE J. U. Durhan, Esq.
Senior Vice President rad Corporate Counsel 8 0121gocqg S
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SSIflS flo. : 6835 Accession fic.:
UtlITED STATES 2008220261
?!UCLEAR REGULATORY CC!' MISSION It! 80-42 0FFICE 07 INSPECTION AfiD EllFORCEfiEflT UASHII:GTON,0.C.
20555 November 24, 10E0 IE Inforration flotice fio. 80 42:
EFFECT OF PADIATI0fl Oil HYDRAULIC SNUBBER rLUID 4
Descriotion of Circurstances:
On' August 7,1980, Florida Power Corporation (FPC) filed a report in accordance with 10 CFR Part 21 that identified an upper service limit of 10 Mrad (regarad) of rediation on the General Electric Versilube F-50 fluid that was provided j
in Anker-Holth shock suppressors mounted on the reactor coolant pumps.
This upper limit was obtained from the results of a study performed for FPC by Pensselaer Polytechnic Institute /.PI).
These results contained two items of prime importance to tne opere.on of the suppressors. The first j
result was a significant increase of the viscosity of the fluid to the extent i
that incipient gelation of the fluid occurreo at exposures of approximately 50 t' rad. The viscosity increased linearly for exposures up to 20 firad and then increaseo exoor.entially for exposures areater than 20 firad.
The second result showed that hydrochloric acid (hcl) was forned in significant quantities when the fluid was subjected to radiation. The following table lists the dose irraciation time and hcl forned.
l Dose Irradiation hcl Forced
(!' rad)
Tire (ppm) 0 2.78 i
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 recorrendatiens 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 a+ Crystal River flo. 3 plant had absorbed doses ranging l
from 2.0 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.
l This IE Infornation f!otice is provided as an early notification of a possibly I-sicnificant ratter that is still under review by the flRC staff.
Recipients should review the infornation for possible applicability to their facilities.
fio scecific action or response is requested at this time.
If NRC evaluations so indicate, further licensee actions may be requested or required.
I l
I It! E0-42
?!ovenber 24, 1980 Page 2 of 2 l
?!o written response to this IE Inforretion t'otice is renuired.
If you have any questions regardir.g this r.atter, please contact the Director of the apprcpriate flRC Rocional Office.
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Ill 80-42 flovember 24, 1980 RECEllTLY ISSUED 4
IE I!!r0FNATIGi! t;0iiCES i
l l-Information uate or j
f!atice t'o.
Subiect Issue Issued to m
)
80-41 Failure of Swing Check 11/10/80 All power reactor Valve in the Decay Feat facilities with an OL Renoval Systen at Davis-or CP Besse Unit fio. 1 j
s 80-40 Failure Of Swing Check 11/10/80 All power facilities
'!alve In The Decay Feat with and OL or CP "eroval Systen At Davis-Besse Unit!o. 1 80-39 ftalfunctions Of Solenoid 10/31/80 All light water reactor i
Valves l'anufactured By facilities holding Valcor Engineerirg Corporation power reactor OLs or cps t
80-38 Crackinn In Charging Pump 10/30/80 All PHR facilities i
Casino Cladding with an OL or CP 80-37 Containrent cooler leaks 10/24/80 All nuclear power and reector cavity facilities holding l
f1 ceding at Indian Foint power reactor OLs Unit 2 or cps I
f 80-36 Failure of Steam 10/10/80 All nuclear power j
Generator Support Bolting reactor facilities holding power reactor OLs or cps 4
80-35 Leakinc and dislodged 10/10/80 All categories G and j
Iodine-124 implant seeds G1 medical licensees 80-?4 Coron dilution of reactor 9/26/80 All pressurized water coolant during steam reactor facilities generatcr decontamination holding power reactor OLs s
80-33 Determination of teletherapy 9/15/80 All teletherapy timer accuracy (G3) licensees
]
80-32 Clarification of certain 8/12/80 All flRC and agreement requirements for Exclu-state licensees sive-use shipments of radioactive materials
- Operating Licenses or Construction Permits 3