ML20033D157

Forwards Details of SER Issues Discussed at 811130 Meeting W/Nrc Re Compliance w/NUREG-0313 & NUREG-0619.Subj Issues Are Considered Closed for Licensing Purposes

ML20033D157
Person / Time
Site:	Clinton
Issue date:	12/02/1981
From:	Geier J ILLINOIS POWER CO.
To:	John Miller Office of Nuclear Reactor Regulation
References
RTR-NUREG-0313, RTR-NUREG-0619, RTR-NUREG-313, RTR-NUREG-619 U-0366, U-366, NUDOCS 8112070313
Download: ML20033D157 (5)

Text

U-0366

/LLING/S POWER COMPANY Y

L30-81'(12-02)-6 500 SOUTH 27TH STREET DECATUR, ILLINOls 62525 December 2, 1981 Ss Mr. James R. Miller, Chief fp Standardization & Special Projects Branch q

Division of Licensing g

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Office of Nuclear Reactor Regulations U. S. Nuclear Regulatory Commission t-4 Washington, D. C.

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Dear Mr. Miller:

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Clinton Power Station Unit 1 N

e Docket No. 50-461 Attached are details related to the following items which were discussed with D. Smith, Materials Engineering Branch, during a meeting of November 30, 1981 to resolve issues for the Clinton SER:

4 ISSUES Compliance with nun.S-0313

" Technical Report on Material Selection and Processing Guidelines for BWR Coolant Pressure Boundary Piping" Compliance with NUREG-0619 "BWR Feedwater Nozzle and Control Rod Drive Return Line Nozzle Cracking" The above items are considered by the NRC and IP to be closed for CPS licensing purposes.

Sincerely, WPJA

\\i.D. Geier Manager, Nuclear Station Engineering Attachments cc:

J.H. Williams, NRC Clinton Project Manager H.H. Livermore, NRC Resident Inspector D. Smith, NRC MTEB el p%

8112070313 811202

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.I_ssue Compliance with NUREG-0313

" Technical Report on

~ Material Selection and Processing Guidelines for BWR Coolant Pressure Boimdary Piping" has not - been demonstrated.

Response

As stated in our answer to question 252.1, Amendment 8, October, 1981, Clinton complies with NUREG-0313, Rev. 1.

Dave Smith (NRC Materials Branch) called 11/13/81 and.had some additional concerns.

I explained what we had done to the-recirc pipe and sent him a. draft rewrite to:FSAR 5.2.3.4.1.1 (attached).

1 s-1 Action' Required IP will revise!FSAR 5.2.3.4.1.1 to accuratelyidescribe reactor:

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recirculation. piping.IGSCC mitigation measures.

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43 5.2.3.4.1.1 A.

Regulatory Guide 1.44:

Clinton complies with Regulatory Guide 1.44.

B.

NUREG 0313:

Clinton complies with NUREG 0313, Rev. 1.

C.

Method cf compliance:

With t1 aption of the reactor.recire pipe, all wrought austente.2 ctainless steel in contact with the reactor coolant is 316 L stainless and therefore has less than

.03% carbon content.

The reactor recire piping is fabricated primarily of 304 stainless steel.

Certain portions have been changed to-

" nuclear grade" type 316 L which contains less than.03%

carbon.

The remainder has had " corrosion resistant clad" applied in the vicinity of field welds so that no heat-affected type 304 will be in contact with the coolant.

The piping assemblics were all solution annealed after all shop welding and application of the cladding.

The following additional process controls were applied in addition to material selection.

All austenitb: stainless steel was purchased in the solu-tion heat treated condition ~in accordance with applicable ASME and ASTM specifications.

Carbon content-was limited to 0.081 maximum, and cooling rates from solution heat treating temperatures were required to be rapid enough to prevent sensitization.

Welding heat input was restricted to 110,000 joules per inch maximum, and interpass temperature to 350*F.

High heat' welding processes such as block welding and electro-slag welding were not permitted.

All weld filler metal and castings were required-by specification to have a minimum of 5% ferrite.

Whenever any wrought austenitic stainless steel was heated to temperatures over 800*F, by means.other than welding i

or thermal cutting, the material was re-solution-heat treatea.

1 These controls were used to avoid severe sensitization and'to comply with the intent of Regulatory Guide 1.44, j

" Control of the Use of Sensitized-Stainless Steel".

.e 5.2.3.4.1.1 (Continued)

Since Clinton complies completely with NUREG-0313, no additional inservice inspect. ion or leak detection are required.

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Issue Compliance with NUREG-0619 "BWR Feedwater Nozzel and Control Room Drive Return Line Nozzel Cracking" has not been demonstrated.

Response

As stated in our answer to question 252.2, Amendment 8, October, 1901, Clinton complies with NUREG-Oo19 with clari-fications as noecified.

u Action Required None

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