ML20010B937

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Forwards Corrected Sheet for Section 5.1.1 of Test Spec to Be Used to Environmentally Qualify Conax Electrical Penetration Canisters at Facility
ML20010B937
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 06/30/1981
From: William Jones
OMAHA PUBLIC POWER DISTRICT
To: Seyfrit K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
NUDOCS 8108180498
Download: ML20010B937 (2)


Text

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Omaha Public Power District 1623 HARNEY a OMAHA. NEBRASKA 68102 a TELEPHONE 536-4000 AREA CODE 402 June 30, 1981

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Mr. K. V. Seyfrit, Director U. S. Nuclear Regulatory Commission ;y g f * -

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Office of Ir.spection and Enforcement ig'- AUG 171981> 12 "W

Region IV '

611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 4 /

Reference:

Docket No. 50-285 4 /g d

Dear P". Seyfrit:

Omaha Public Power District's letter to the Commission dated June 15, 1981, included a copy of the test specification to be used to environmentally qualify the Conax electrical penetration canisters used at the Fort Calhoun Station. In section 5.1.1 of that test specifi-caticq, a ty be 1.5 x 10 0pographical standard CC error was found; of helium the leakage per second, not 1.5 rate allowed x 10+6 should Accord-ingly, the attached corrected sheet should be inserted in the test specification 'n place of the existing sheet.

Sincer,ely,

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Jones

,7 i Division Manager Production Operations WCJ/KJM/TLP:jmm l Attachment cc: U. S. Nuclear Regulatory Conmission Office of Inspection and Enforcement Washington, D.C. 20555

! LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.

Washington, D.C. 20036 l

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8108180498 810630 l PDR ADOCK 05000295 p PDR

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  • 5.0 TEST SPECIFICATIONS (Continued) 5.1.1 Leakage Pressura Test - The leakage rste of a penetration cani-ster assembly shall not exceed 1.5 x 10 8 standard CC of helium per second when tested at . 69 psig for a period of 10 minutes.

The leakage to be measured is out of the test canister past the teflon seal.

5.1.2 Continuity Test -

Each conductor of each feedthrough shall be verified for centinuity. -- - - - ~ ~ - - -

5.1.3 Insulation Resistance Test - The insulator of resistance of each conductor to the other conducto s and sheath shall be measured at 500 -VDC. The minimum insub: tion resistance shall be 104 megohms.

5.1.4 Voltage Withstand Test - Each feedthrough assembly shall be sub-jected to a voltage withstand test between each conductor and all other conductors and sheath conaected together of 2,200 V 60 HZ for not less than one mi te.

5.1.5 Aging -' The sub-components of the pener.rators shall be aged ac-cording to Table 1 att;ched. The aging time shall be 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> at 150 C or 1548 hours0.0179 days <br />0.43 hours <br />0.00256 weeks <br />5.89014e-4 months <br /> at 150 C.

5.1.5a Seismic - Seismic testing of the electrical penetrations shall be done in accordance with IEEE-344 1975 and Regulatory Guide 1.100. Penetration canisters are rigidly mounted in the contain-ment with the sub-assemblies mounted in the canisters as shown in drawing 2325-7684 attached. During a seismic event the motion experienced by the penetrations will be the same as the structure Figures XB 545 S-38 and S-39 showing the structure accelerations.

i For purposes of testing, acceleration at the 1050'-0" elevation shall be used. A 1.5 Lultiplication factor shall be used for the test accelerations. The test shall conaist of 5 OBE and the followed by 1 DBE events. Step 5.1.1, 5.1.2, 5.1.3. and 5.1.4 shall be completed following the seismic testing. From Figures 1 and 2 attached, the natural frequencies are 3 hertz horizontal and 9 hertz vertical. The absolute containment vertical accele-i ration is given in Figure XB545S-38 and S-39 through the entire spectrum.

5.1.6 Radiation - Penetrations are to be irradiated to 2 x 10?R total integrated gamma dose. Repeat 5.1.1, 5.1.2, and 5.1.4 - each 2 x 10 6R increment.

5.1.7 Design Basis Accident - The assemblies shall be subjected to the following accident conditions, as outlined in the attached test profile.

305 *F 74 psig 1900 ppm boron chemical spray buffered with sodium hydroxide for.

a ph of 9.0 at 0.6 GPM per square foot 1

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