AECM-84-0470, Forwards Request for Relief from ASME Section XI Code Requirements for Inservice & Preservice Insp of Pressure Retaining Piping Weld.Expeditious Review Requested

Forwards Request for Relief from ASME Section XI Code Requirements for Inservice & Preservice Insp of Pressure Retaining Piping Weld.Expeditious Review Requested

ML20097J894
Person / Time
Site:	Grand Gulf
Issue date:	09/20/1984
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
AECM-84-0470, AECM-84-470, TAC-52631, TAC-55522, TAC-55524, TAC-55762, TAC-57222, NUDOCS 8409240097
Download: ML20097J894 (8)

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MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi M P. O. B OX 1640, J AC K S O N. MIS SIS SIP PI 3 9 205 September 20, 1984 NUCLEAR LICEN$1NG & SAFETY DEPARTMENT U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D. C. 20555 Attention: Mr. Harold R. Denton, Director

SUBJECT:

Grand Gulf Nuclear Station Unit i Docket No. 50-416 License No. NPF-13 File: 0260/L-860.0/L-952.0/M-189.0 Preservice and Inservice Inspection to ASME Section XI (Request Nos.

I-00012 and 00015)

AECM-84/0470 This letter transmits requests for relief from ASME Section XI Code requirements for the inservice inspection (No. I-00012) and also for the Preservice Inspection (No. 00015) of the pressure retaining piping weld for the Grand Gulf Nuclear Station (GGNS) Unit 1 in accordance with 10CFR50.55a(g)(5) (IV) .

The attachment delineates the information with regard to such relief requests for your review. The details of the attached relief requests and reasons for seeking relief are similar to those for other welds for which Relief Request No. 00007/I-00010 were previously submitted. It is to be noted that Relief Request No. 00007 was approved in SSER 2, Appendix D and that the approval of Relief Request No. 1-00010 for the Inservice Inspection program is pending.

Please provide your expeditious review to support the completion of the Preservice Inspection program and the commencement of the Inservice Inspection program.

If you have any questions or require further information, please contact this office.

Yours truly,

~

G M O

@ . F. Dale Director GS/JGC:cb Attachment cce (See Next Page)

L Member Middle South Utilities System II

AECM-84/0470 MISSISSIPPI POWER & Ll2HT COMPANY Pcgs 2

.cc:: Mr. J. -B; Richard (w/a)

Mr. R. B. McGehee (w/o)

.Mr. N. S. Reynolds (w/o)

Mr. G_. B. Taylor (w/o)

.Mr. Richard C. DeYoung, Director (w/a)

Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.'C. 20555 Mr. J. P. O'Reilly, Regional Administrator (w/a)

U.S. Nuclear Regulatory Commission Region II 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia -30323

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Attachent to AECM-84/0470 PAGE 1 of 3 GRAND GULF NUCLEAR STATION UNIT 1 REQUEST FOR RELIEF NO: 1-00012 INSERVICE INSPECTION 0F- PRE 550RE 1tETKIllTEWLDS -

.I.. Component: Inaccessible portion of Class I pressure retaining piping weld located on reactor core isolation cooling fRCIC, E51). (See Table 1 for details.)

.II. Code: This portion of the pressure retainina piping weld was designed and fabricated to the ASME Section III, Class 1 requirements. Applicable inservice inspections are to be performed in accordance with the ASME Section XI,1977 Edition through and including Summer 1979 Addenda.

III. Code requirements: Class 1 pressure retaining piping welds are required to be

. volumetrically and surface examined, essentially 100% of the weld, once every ten-year interval in accordance with ASME Section XI, Table IWB-2500-1,. Category B-J.

I 'IV._ Information.to A portion of the listed weld that was preservice support the deter- examined has a physical obstruction due to design. Due to i mination that the .the limited accessibility, it-is impractical to volumetrically code requirements examine 100%.of the weld-listed on Table 1.

are impractical:

V. Specific relief- Permission is requested to exempt from volumetric examination requested: the inaccessible portion of the Class 1 weld listed on Table 1.

'VI. Reasons why relief Request for an exemption should be granted for the following should be granted: reasons:

1. The entire listed' weld was examined by radiography and passed in accordance with ASE Section III, Class 1

. requirements. ,

2. The entire listed weld was surface examined (liquid pene-trant) and passed in accordance with ASE Section III and/or Section XI, Class I requirements.

The listed weld was subjected to a hydrostatic test and 3.

VT-2 examination in accordance with ASME Section XI, Class I requirements and no leaks were found.

4. The listed piping weld will be subject to a system leakage test after each refueling outage for Class 1 in accordance with ASME Section XI requirements.

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Attachment to AECM-84/0470 PAGE 2 of 3 GRAND GULF NUCLEAR STATION

. UNIT 1 REQUEST FOR RELIEF N0; I-00012 (Continued)

INSERVICE INSPECTION OF PRE 55URFRETATRIWinELDS

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.VI. Reasons why relief 5. .The listed piping weld will be subject to a system hydro-should be granted: static test each inspection interval in accordance with ASE Section XI,-Class 1 requirements.

6. The entire listed weld, including that portion inaccessible for volumetric examination, will be surface examined each inspection interval, in accordance with ASME Section XI.

7. Accessible portion of the listed weld will be volumetri- ,

cally examined each inspection interval in accordance with ASE Section XI. Should indications be found, an engineering evaluation will be made to determine if the inaccessible portion of the listed weld has been affected.

8. Leak detection is provided, by way of leakage detection system with continuous monitoring for the RCIC system.-

9. The failure of this weld would have no adverse effect on plant safety as there is isolation capability as part of

. the plant design.

VII. Alternative The accessible portion of the weld identified in Table 1 will testing: be inspected twice by volumetric examination during the 10 year interval.

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, yg GRAND GULF NUCLEAR STATION UNIT 1 l g3 -REQUEST FOR RELIEF NO. I-00012 j im TABLE 1

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! II% LIMITED TYPE REASON FOR l ITEM SYSTEM PIPE

NO. NO. WELD NO. 150 NO. SIZE COWONENT NtEA SCAN CLASS LIMITATIONS i

1 E51 502 R1-11-7 6" VALVE TO ELBOW 25% T 1 RADIUS OF i ELBOW

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Attachment to AECM-84/0470 ,

PAGE 1 of 3 '

. GRAND GULF NUCLEAR STATION UNIT 1 REQUEST FOR RELIEF NO.00015 PRESERVICE INSPECTION OF PRE 55URE RETAINING WELDS f I. Component: Inaccessible portion of Class I pressure retaining piping weld I located on reactor core isolation cooling (RCIC, E51). (See Table 1 for details.)

II. Code: This portion of the pressure retaining piping weld was designed and fabricated to the ASME Section III, Class 1 requirements. Applicable preservice inspections are to be performed in accordance with the ASME Section XI,1977  !

Edition through and including Summer 1979 Addenda.

III. Code requirements: Class 1 pressure retaining piping welds are required to be volumetrically and surface examined, essentially 100% of the weld, once every ten-year interval in accordance with ASME Section XI Table IWB-2500-1 Category B-J.

IV. Information to A portion of the listed weld that was preservice support the deter- examined has a physical obstruction due to design. Due to mination that the the limited accessibility, it is impractical to volumetrically code requirements examine 100% of the weld listed on Table 1.

are impractical:

V. Specific relief Permission is requested to exempt from volumetric examination requested: the inaccessible portion of the Class 1 weld listed on Table 1.

VI. Reasons why relief Request for an exemption should be granted for the following should be granted: reasons:

1. The entire listed weld was examined by radiography and passed in accordance with ASE Section III, Class 1 requirements.

2. The entire listed weld was surface examined (liquid pene-trant)'and passed in accordance with ASE Section III and/or Section XI, Class I requirements.

3. The listed weld was subjected to a hydrostatic test and VT-2 examination in accordance with ASME.Section XI Class 1 requirements and no leaks were found.

4. The listed piping weld will be subject to a system leakage test after each refueling outage for Class 1 in accordance with ASME Section XI requirements.

• * '*~

Attachment to AECM-84/0470 PAGE 2 of 3 GRAND GULF NUCLEAR STATION UNIT 1 REQUEST FOR RELIEF NO. 00015 (Continued)

PRESERVICE INSPECTION 6 LDS VI. Reasons'why relief 5. The listed piping weld will be subject to a systen hydro-

-should be granted: static test each inspection interval in accordance with ASE Section XI, Class 1' requirements.

6. The entire listed weld,' including that. portion inaccessible for volumetric examination, will be surface examined each inspection interval, in accordance with ASME Section XI.

7. Accessible portion of the listed weld will be volumetri-cally. examined each inspection interval in accordance with ASE Section XI. Should indications be found, an engineering evaluation will be made to determine if the inaccessible portion of the listed weld has been affected.

8. ' Leak detection is provided, by way of leakage detection system with continuous monitoring for the RCIC system.

9. The failure of this weld would have no adverse effect on plant safety as there is isolation capability as part of the plant design.

VII. Alternative The accessible portion of the weld identified in Table 1 will testing: be inspected twice by volumetric examination during the 10 year interval.

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PAGE 3'of 3 o GRAND GULF NUCLEAR STATION UNIT 1 o

uO REQUEST FOR RELIEF NO. 00015 go TABLE 1 an 5i

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$ ! ITEM SYSTEM PIPE LIMITED TYPE REASON FOR NO. NO. WELD NO. ISO NO. SIZE COPPONENT AREA SCAN- CLASS- LIMITATIONS 1 E51 502 R1-11-7 .6" VALVE-TO ELBOW 25% T 1 RADIUS OF I

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