U-600753, Forwards Util Inservice Exam Program,Consisting of long-term Inservice Exam Plan for First 10-yr Interval for Piping & Components.Relief Requests Covering Welds of Inservice Exam Program Also Encl

Forwards Util Inservice Exam Program,Consisting of long-term Inservice Exam Plan for First 10-yr Interval for Piping & Components.Relief Requests Covering Welds of Inservice Exam Program Also Encl

ML20213F358
Person / Time
Site:	Clinton
Issue date:	11/07/1986
From:	Spangenberg F ILLINOIS POWER CO.
To:	Butler W Office of Nuclear Reactor Regulation
Shared Package
ML20213F360	List: ML20213F363 ML20213F376 ML20213F386 U-600753, Forwards Util Inservice Exam Program,Consisting of long-term Inservice Exam Plan for First 10-yr Interval for Piping & Components.Relief Requests Covering Welds of Inservice Exam Program Also Encl
References
U-600753, NUDOCS 8611140173
Download: ML20213F358 (14)

Text

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U-600753 L30-86(ll-07)-L 1A.120 ILLINO/S POWER OOMPANY CLINTON POWER STATION P.o. BOX 678, CLINTON ILLINOIS 61727 November 7, 1986 Docket No. 50-461 Director of Nuclear Reactor Regulation Attention: Dr. W. R. Butler, Director BWR Project Directorate, No. 4 Division of BWR Licensing

$fgN U. S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Clinton Power Station Unit 1 Inservice Examination Program Plan

Dear Dr. Butler:

Attached is the Clinton Power Station Inservice Examination Program Plan, which consists of a Long-Term Inservice Examination Plan for the first 10-year interval for piping and components, and component supports. Also being submitted are relief requests covering welds of the Inservice Examination Program which were previously requested for the Preservice Examination Program. g 7

The relief requests constitute conditions that were originally found during performance of Preservice Examinations. These conditions

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are as follows: (1) eleven welds located below the surface of the suppression pool, (2) two welds located within wall penetrations, and (3) one weld located underneath component supports. The relief requests specifically identify the welds involved and provide justification for deviating from the specific requirements of the ASME Code and 10CFR50.55a. Please contact us should you have any questions on this matter.

Sincerel yours,

/

o. . r 8611140173 861107 F. A.

I pang therg I

U PDR ADOCK 05000461 P PDR Manager - L censing and Safety DWW/bsa Attachments cc: B. L. Siegel, NRC Clinton Licensing Project Manager NRC Resident Office Regional Administrator, Region III, USNRC Illinois Department of Nuclear Safety h0l b elS Y bfo

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Welds Covered by the Relief Requests NDE Performed under Section III ASME SECTION III ASME SECTION III WELD NUMBERS REQUIRED NDE NDE PERFORMED 1RH-22-6-2 RT RT & UT Thickness only IRH-22-6-3 RT RT, PT & UT Thickness only 1RH-22-6-4 RT RT, PT & UT Thickness only IRH-28-6-2 RT RT 1RH-28-6-3 RT RT & UT Thickness only 1RH-28-6-4 RT RT & UT Thickness only IRH-25-9-3 RT RT 1RI-4-6-2 RT RT & UT Thickness only 1RI-4-7-2 RT RT ISF-1-1-2 RT RT ISF-3-4-4 RT RT ISF-3-5AQ1 RT RT IVP-6-1-5 RT RT

) 1Rl-13-8AQ1 RT & MT/PT RT, PT & UT Thickness only t

NDE - Nondestructive Examination j RT - Radiographic Testing l UT - Ultrasonic Testing l

PT - Dye penetrant Testing I

1

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I i _ _ _ _ __.._.__.., _ __._... _.. _ __.

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

1 A. System: Residual Heat Removal (RH)

B. Weld Number: 1RH-28-6-2 and associated longitudinal seam C. Piping Line Number: 1RH30CB D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Dissimilar material - Carbon Steel - SA 106 Gr.B Stainless Steel - SA 358 Gr. 304 CS - 0.500 inch G. Piping Nominal Wall Thickness: SS - 0.625 inch H. Function: This line directs discharge from RH heat exchanger inlet relief valve to the suppression pool. This line is the last section of piping prior to suppression pool discharge and is open ended. See sketch below.

II. Relief from:

A. Requirements: 10CFR50.55a (b) (2) (iv) (A) i B. Reason for Relief: This line is an open ended piping and this weld is located below the surface of the suppression pool. Any leakage from this weld would not be detrimental to system operation in maintaining the plant in a cold shutdown condition or mitigating the consequences of an accident.

C. Alternate Examination: None I

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

A. System: Residual Heat Removal (RH)

B. Weld Number: 1RH-28-6-3 and 1RH-28-6-4 and associated longitudinal seam C. Piping Line Number: 1RH30CB D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Stainless Steel SA 358 Gr. 304 G. Piping Nominal Wall Thickness: 0.625 inch H. Function: This line directs discharge from RH heat exchanger inlet relief valve to the suppression pool. This line is the last section of piping prior to suppression pool discharge and is open ended.

II. Relief from:

A. Requirements: 10CFR50.55a (b) (2) (iv) (A)

B. Reason for Relief: This line is an open ended piping and these welds are located below the surface of the suppression pool. Any leakage from this weld would not be detrimental to system operation in maintaining the plant in a cold shutdown condition or mitigating the consequences of an accident.

C. Alternate Examination: None

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification A. System: Residual Heat Removal (RH)

B. Weld Number: 1RH-22-6-2 and 1RH-22-6-4 and associated longitudinal seams C. Piping Line Number: 1RH30CA D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Stainless Steel SA-358 Gr. 304 G. Piping Nominal Wall Thickness: 0.625 inch H. Function: This line directs discharge from RH heat exchanger inlet relief valve to the suppression pool. This line is the last section of piping prior to suppression pool discharge and is open ended.

II. Relief from:

A. Requirements: 10CFR50.55a (b) (2) (iv) (A)

B. Reason for Relief: This line is an open ended piping and

these welds are located below the surface of the suppression pool. Any leakage from the welds would not be 1

detrimental to system operation in maintaining the plant in a cold shutdown or mitigating the consequences of an accident.

C. Alternate Examination: None l

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

A. System: Residual Heat Removal (RH)

B. Weld Number: 1RH-22-6-3 and associated longitudinal seam C. Piping Line Number: 1RH30CA D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Dissimilar material Carbon Steel - SA 106 Gr. B Stainless Steel - SA 358 Gr. 304 SS - 0.625 inch G. Piping Nominal Wall Thickness: CS - 0.500 inch H. Function: This line directs discharge from RH heat exchanger inlet relief valve to the suppression pool. Th'.s line is the last section of piping prior to suppression pool discharge and is open ended.

II. Relief from:

A. Requirements: 10CFR50.55a (b) (2) (iv) (A)

B. Reason for Relief: This line is an open ended piping and this weld is located below the surface of the suppression pool. Any leakage from this weld would not be detrimental to system operation in maintaining the plant in a cold shutdown condition or mitigating the consequences of an accident.

C. Alternate Examination: None

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

A. System: Residual Heat Removal (RH)

B. Weld Number: 1RH-25-9-3 C. Piping Line Number: 1RH02AB D. ASME Section III Code Class: 2 E. Line Size: 14 inches F. Material: Carbon Steel SA-106 GR. B G. Piping Nominal Wall Thickness: 0.438 inch H. Function: This line is a discharge line of RH pump B l

II. Relief from:

A. Requirements: 10CFR50.55a (b) (2) (iv) (A)

B. Reason for Relief: This weld is located inside the Auxiliary Building wall penetration sleeve number 1AB00ll and is inaccessible to perform any nondestructive examination.

C. Alternate Examination: None

k d

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

A. System: Reactor Core Isolation Cooling (RI)

B. Weld Number: 1RI-4-6-2 C. Piping Line Number: 1RIO8C D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Carbon Steel SA-106 GR. B G. Piping Nominal Wall Thickness: 0.500 inch t

H. Function: This line provides an exhaust for RI turbine and discharges into the suppression pool.

j II. Relief from:

A. Requirements

1WC-2000 Examination and Inspection

! B. Reason for Relief: This line is an open ended piping and this weld is located below the surface of the suppression pool. Any leakage from this weld would not be detrimental to system operation.

C. Alternate Examination: None J

l J

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST

1. Weld (s) Identification:

A. System: Reactor Core Isolation Cooling (RI)

B. Weld Number: 1RI-4-7-2 C. Piping Line Number: 1RIO8C D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Stainless Steel SA-358 Gr. 304 G. Piping Nominal Wall Thickness: 0.625 inch H. Function: This line provides an exhaust for RI turbine and discharges into the suppression pool.

II. Relief from:

A. Requirements: lWC-2000 Examination and Inspection B. Reason for Relief: This line is an open ended piping and this weld is located below the surface of the suppression pool. Any leakage from this weld would not be detrimental to system operation.

C. Alternate Examination: None

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

A. System: Suppression Pool Cleanup and Transfer (SF)

B. Weld Number: ISF-1-1-2 C. Piping Line Number: ISF02A D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Stainless Steel SA-358 Gr. 304 C1. 1 G. Piping Nominal Wall Thickness: 0.375 inch H. Function: This line provides a suction from the suppression pool for the SF System.

II. Relief from:

A. Requirements: 1WC-2000 Examination and Inspection B. Reason for Relief: This line is an open ended piping and this weld is located below the surface of the suppression pool. Any leakage from this weld would not be detrimental to system operation.

C. Alternate Examination: None

r INSERVICE EXAMINATION NONDESTRUGTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

A. System: Suppression Pool and Transfer (SF)

B. Weld Number: 1SF-3-4-4

• C. Piping Line Number: ISF01G D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Dissimilar material - Carbon Steel - SA 106 Gr.B Stainless Steel - SA 312 Gr. TP304 CS - 0.375 inch G. Piping Nominal Wall Thickness: SS - 0.375 inch H. Function: This line provides a discharge from the SF system into the suppression pool.

II. Relief from:

A. Requirements: 1WC-2000 Examination and Inspection B. Reason for Relief: This line is an open ended piping and this weld is located below the surface of the suppression pool. Any leakage from this weld would not be detrimental to system operation.

C. Alternate Examination: None

r INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

A. System: Suppression Pool Cleanup and Transfer (SF)

B. Weld Number: ISF-3-5-AQ1 C. Piping Line Number: 1SF01G D. ASME Section III Code Class: 2 E. Line Size: 12 inches F. Material: Stainless Steel SA-312 GR. TP 304 G. Piping Nominal Wall Thickness: 0.375 H. Function: This line provides a discharge from the SF system into the suppression pool.

II. Relief from:

A. Requirements: 1WC-2000 Examination and Inspection B. Reason for Relief: This line is an open ended piping and this weld is located below the surface of the suppression pool. Any leakage from this weld would not be detrimental to system operation.  ;

C. Alternate Examination: None

r INSE"VICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST

1. Weld (s) Identification:

A. System: Drywell Cooling B. Weld Number: 1VP-6-1-5 C. Piping Line Number: 1VP02BB D. ASME Section III Code Class: 2 E. Line Size: 10 inches F. Material: Carbon Steel SA-106 Gr. B G. Piping Nominal Wall Thickness: 0.365 inch 11 . Function: This line provides chilled water to the drywell coolers.

II. Relief from:

A. Requirements: 1WC-2000 Examination and Inspection B. Reason for Relief: This weld is located inside the containment penetration sleeve number IMC-107 and is inaccessible to perform any examination.

C. Alternate Examination: None

INSERVICE EXAMINATION NONDESTRUCTIVE EXAMINATION OF PIPING WELDS RELIEF REQUEST I. Weld (s) Identification:

A. System: Reactor Core Isolation Cooling (RI)

B. Weld Number: 1RI-13-8AQ1 C. Piping Line Number: 1RIO3C D. ASME Section III Code Class: 1 E. Line Size: 4 inches F. Material: Carbon Steel SA-333 Gr. 6 G. Piping Nominal Wall Thickness: 0.438 inch H. Function: This line provides the cooling water to the reactor pressure vessel.

II. Relief from:

A. Requirements: 1WB-2000 Examination and Inspection B. Reason for Relief: This weld is located underneath a component support and is inaccessible because the support is welded and its design does not allow for disassembly.

The removal and reinstallation of this support would require grinding and rewelding instead of disassembiv as found with other supports.

C. Alternate Examination: None