ML20125B126

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Forwards Request for Relief from Inservice Insp Requirements of Section XI of 1980 Edition of ASME Boiler & Pressure Vessel Code Re Plant Boron Recycle Sys
ML20125B126
Person / Time
Site: Catawba Duke Energy icon.png
Issue date: 06/03/1985
From: Tucker H
DUKE POWER CO.
To: Harold Denton, Stolz J
Office of Nuclear Reactor Regulation
References
NUDOCS 8506110322
Download: ML20125B126 (8)
v • d • e


Text

..

DUKE POWER GOMPANY P.O. nox 33180 CHAHLOTTE. N.C. 28242 HALH. TUCKER TELEPSIONE 7905 PatetDENT.

(704) 373-6831 June 3, 1985

.. = = = -

Mr. Harol'd R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Attention:

Mr. John F. Stolz, Chief Operating Reactor Branch No. 4

Subject:

Catawba Nuclear Station, Unit 1 Docket No. 50-413

Dear Sir:

Pursuant to 10 CFR 50, 550.55a, please find attached a request for relief from the inservice inspection requirements of Section X1 of the 1980 Edition of the ASME Boiler and Pressure Vessel Code (with addenda through Winter 1980). The attached request concerns inservice inspections of the Baron Recycle' System at Catawba Unit 1.

This request for relief requires payment of a fee for approval as described in 10 CFR 70, 5170.12. Accordingly, please find attached a check in the amount of $150.00 as set forth in 5170.21.

Very truly yours, d

' ccd Hal B. Tucker WLH: sib Attachment cc:

Dr. J. Nelson Grace, Regional Administrator Palmetto Alliance U. S. Nuclear Regulatory Commission 2135 Devine Street Region II Columbia, South Carolina 29205 101 Marietta Street, NW, Suite.2900 Atlanta, Georgia 30323 Robert Guild, Esq.

P. O. Box 12097 NRC Resident Inspector Charleston, South Carolina 29412 Catawba Nuclear Station Mr. Jesse L. Riley Dr. K. Jabbour Carolina Environmental Study Group Office of Nuclear Reactor Regulation 854 Henley Place U. S. Nuclear Regulatory Commission Charlotte, North Carolina 28207 Washington, D. C.

20555 8506110322 950603 Oh JA M

PDR ADOCK 05000413 7

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DUKE POWER COMPANY CATAWBA NUCLEAR STATION - UNIT 1 REQUEST.FOR RELIEF FROM ASME CODE SECTION XI

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(WITH ADDENDA THROUGH WINTER-1980)

. Inservice Inspection Requirements 1.

Component For Which Exemption Is Requested:

.(a)

Name and Number:

Two isolation valves on the INB,' Boron Recycle System relief valve header discharge are being replaced because of over pressurization from a Unit

  1. 2 hydrostatic test.

Valve 1NB-378, Weld #1NB121-4, 3",

SS-Valve INB-395, Weld #1NB172-5, 6",

SS (b)

Function:

This. system channels discharged water from the relief valves to the Boron hold up tanks A or B.

Valves INB378 and INB395 isolate Unit 1 from Unit 2.

(c)

ASME'Section III Code Class:

Equivalent to'ASME Class 3 (d)

Valve Category:

N/A 2.

Reference Code Requirement That Has Been Determined To Be Impractical:

ASME B & PV Code,Section XI, 1980 through' winter 1980 addenda. Article IWD-5000.

p

.Requ2st For R211sf From ASME Coda Section XI Paga 2'of 2

-(With Add;nda Through Winter 1981) 3.

Basis For Requesting Relief:

Performing a-hydrostatic test on the Boron Relief Valve discharge header would' be impractical extremely difficult and very costly due to the following reasons.-

(a) A Hydro. Test would constitute isolating.the Boron Hold-Up Tank which would in turn require. removal of the Reactor Vessel head and-defuelings..

~

(b) 1 Freeze sealing the three (3) inch and six (6) inch lines would require cutting piping on the Unit 2 side of the isolation valves giving rise to the possibility of contaminating Unit 2 piping.

(c). Operations Procedure OP/1/A/6200/03. will preclude the closing of isolation valves INB66 and INB84 at the same time.

This will in-Jsure that the discharge _ header has a continuous flow to hold up tank A or B which'are vented to atmosphere.

4.

Alternate Examination:

A 100% radiograph inspection (NDE-10)-and an inservice Icak test of

' Welds INB121-4, and INB172-5, will insure volumetric and operational intregrity.

These welds will also receive a Hydro inspection at the ten (10) year inspection interval.

i 5.

Implementation Schedule:

'These examinations, with exception of the Hydrostatic Test, will be conducted after the valve installations are complete and prior to the L

system being declared operable.

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