ML18191A204

Submits 40 Copies Documenting Conformance with Positions Stated in NUREG-0313, Technical Report on Material Selection and Processing Guidelines for Bwr Coolant Pressure Boundary Piping

ML18191A204
Person / Time
Site:	Columbia
Issue date:	06/26/1978
From:	Renberger D Washington Public Power Supply System
To:	Varga S Office of Nuclear Reactor Regulation
References
G02-78-164
Download: ML18191A204 (11)

Text

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E r Washington Public Power Supply System A JOINT OPERATING AGENCY Docket No. 50-397 G02-78-164 June 26,'978 P. 0 BOX 966 3000 GEO. WASHIHGTON WAY RICHLAND, WASHINGTON 99352 PHONE cJ (509) 946-16I1 Mr. S.

A. Varga, Chief Light Water Reactor Branch No.

4 Division of Project Management U. S. Nuclear Regulatory Commission Washington, D.

C.

20555

Subject:

WPPSS NUCLEAR PROJECT NO.

2 USE OF AUSTENITIC STAINLESS STEEL 1

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Reference:

1)

Letter, GI2-78-108, SA Varga to NO Strand, same subject, dated March 6, 1978 2)

Letter, G02-78-106, DL Renberger to SA Varga, same subject, dated March 27, 1978

Dear Mr. Varga:

Your reference (1) requested information documenting our conformance with positions stated in NUREG-0313, "Technical Report on Material Selection and Processing Guidelines for BWR Coolant Pressure Boundary Piping".

Accordingly, forty copies of the requested information is provided as attachment I for your review and use.

This satisfies our commitment to you made in reference (2).

Very truly yours, DLR:DCT/OKE:cph

Attachment:

As stated D. L.

RENBERGER Assistant Director Generation and Technology cc:

I. Littman,-

WPPSS -

NY J. Ellwanger, B&R E. Chang,

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Attachment I Page 1 of 3 Conformance of WNP-2 to Positions in NUREG-0313 WNP-2 austenitic stainless steel pipe and fittings (Type 304) to which NUREG-0313 applies consist of the following:

o the reactor recirculation (RRC) system loops; o

the residual heat removal (RHR) system shutdown cooling suction and return lines from the RRC system loops to the, inner containment isolation valve or check valves, and o

the RRC to reactor water cleanup system interties.

Conformance to Parts II and III of NUREG-0313 is as follows:

Part II.l Pipe and fittings conforming to the corrosion resistant guidelines in this part are the twelve (12) inch RRC return lines and the RRC bypass stubs.

These components as-installed, with the exception of field welds, are in the solution annealed condition.

Part II.2 "

Field welds associated with the return lines and the stubs referred to above included corrosion resistant

cladding, 308 material with a maximum carbon content of 0.028/ and a minimum ferrite content of 8%,

and standard 308 weld filler metal with a minimum of 8%

ferrite.

The weld preparation after cladding allowed only the cladding material to form the weld on the interior diameter, i.e.,

no material which may have become sensitized by the field weld and comes in con-tact with the reactor coolant has a carbon content greater than 0.028$.

Part III.l See Parts II.1 and II.2 above for piping which con-forms to Part II.

The nonconforming RRC system piping is already installed.

The nonconforming RHR system piping is presently being installed and scheduled for completion in September, 1978.

As can be seen, WNP-2 conforms to Part II of NUREG-0313 to the extent practicable when considering schedule and the status of plant construction.

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ge Attachment I

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Page 2 of 3 Part III.2.A The nonconforming, not servicesensitive, lines will be initially examined in accordance with ASME Section XI, Subsection IMB; at not more than 80 months after beginning commercial operation.

The lines affected by this time interval are the RRC loops, excluding the twelve (12) inch returnlines which conform to Parts II:1 and II.2.

Part III.2.A (2)

The reactor coolant leakage detection system is described in the FSAR in Sections 5.2.5 and 7.6.1.4.

Part III.2.A (2a)

The compliance with Reg.

Guide 1.45 is discussed in Appendix C;-2, pp C.2-39 through C.2-41 of the FSAR.

Part III.2.A (2b)

WNP-2 currehtly plans to comply with the BWR 5 Stan-

'dard Technical Specification in this area as docu-mented in NUREG-0123; Rev.

1, April 1, 1978, 'if

'practicable..These specifications reflect compliance with the position.

Part III.2.A (2c)

WNP-2 concurs with the definition of unidenti-fied leakage.

With respect to this and the current Rev.

1 of HUREG-0123, it should be noted that the drywell floor drain flow monitoring system does collect leakage from the drywell dia-phragm floor seals.

This leakage is not expected to be significant, however, and thus the floor drain system meets the intent of being the Pri-mary Containment air cooler condensate flow rate monitoring system as stated in NUREG-0123.

Part III.2.B The nonconforming, service sensitive, g ines will be examined on a sampling basis (WNP-2 does not have RRC bypass lines) for three successive inspec-tions, not exceeding the time duration between each of the first three refueling outages.

Other con-venient plant shutdowns may be used during this periodfor one or more of the examinations.

The lines affected by this inspection interval are the austenitic stainless steel RHR shutdown cooling suction and return lines and the stagnated, short pipe spools that are associated with the RRC loops.

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Attachment I Page 3 of' The reactor core spray piping is carbon steel and the RRC bypass

stubs, as previously discussed, conform to Part II and therefore are not subject to this part.

In the event no unacceptable indica'tions

,are found in the three successive inspections for the service sensitive lines, the inspection interval shall revert to an 80 month period.

STATE OF WASHINGTON ss COUNTY OF BENTON

)

D. L.

RENBERGER, Being first duly sworn, deposes and says:

That he is the Assistant Director, Generation and Technology, for the WASHINGTON PUBLIC POWER SUPPLY SYSTEM, the applicant herein; that he is authorized to submit the foregoing on behalf of said applicant; that he has read the foregoing and knows the contents thereof; and believes the same to be true to the best of his knowledge.

DATED V>~ 9 19%

D. L.

RENBERGER On this day personally appeared before me D. L.

RENBERGER to me known to be the individual who executed the foregoing instrument and acknowledged that he signed the same as his free act and deed for the uses and purposes therein mentioned.

GIVEN under my hand and seal this P~

day of

, 1978.

Notary Public in and for the State of Washington Residing at

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