ML042160433
| ML042160433 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 07/27/2004 |
| From: | Garchow D Public Service Enterprise Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| BL-04-001, LR-NO4-0322 | |
| Download: ML042160433 (6) | |
Text
PSEG Nuclear LLC P.O. Box 236, Hancocks Bridge, New Jersey 08038-0236 JUL 2 72004 0 PSEG LR-N04-0322 NuclearLLC United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 60-DAY RESPONSE TO NRC BULLETIN 2004-01 INSPECTION OF ALLOY 82/1821600 MATERIALS USED IN THE FABRICATION OF PRESSURIZER PENETRATIONS AND STEAM SPACE PIPING CONNECTIONS AT PRESSURIZED-WATER REACTORS SALEM GENERATING STATION UNITS I AND 2 DOCKET NOS. 50-272 AND 50-311 FACILITY OPERATING LICENSES NOS. DPR-70 AND DPR-75 The U. S. Nuclear Regulatory Commission (NRC) issued NRC Bulletin 2004-01 to advise Pressurized Water Reactors (PWR) licensees that current methods of inspecting Alloy 82/182/600 materials used in the fabrication of pressurizer penetrations and steam space piping connections may need to be supplemented with additional measures to detect and adequately characterize flaws due to primary water stress corrosion cracking (PWSCC),
All PWR licensees are requested to provide a response within 60 days of the date of the NRC Bulletin to:
- 1. Provide information related to the materials from which the pressurizer penetrations and steam space piping connections at their facilities were fabricated.
- 2. Provide information related to the inspections that have been and those that will be performed to ensure that degradation of Alloy 82/182/600 materials used in the fabrication of pressurizer penetrations and steam space piping connections will be'identified, adequately characterized, and repaired.
Review of original design, fabrication and audit documentation indicates that Alloy 82/182/600 was not used for penetrations, steam space piping or welds. Instrument penetrations, heater sleeves and nozzle safe ends were manufactured from type 316 stainless steel. All welds and weld buttering were made using stainless steel weld filler Af I 95-2168 REV. 7/99
Document Control Desk LR-N04-0322 2
JUL 2 7 2004 material (309L and 308L). Therefore, primary water stress corrosion cracking (PWSCC) of Alloy 82/182/600 is not applicable to the Salem Unit 1 and 2 pressurizers. As discussed with Mathew Mitchell, technical contact for this bulletin, since the Salem pressurizers do not utilize the material addressed by this bulletin, specific details need not be provided in our response. to this letter contains the PSEG Salem Generating Station Units 1 and 2 response to NRC Bulletin 2004-01.
Should you have any questions regarding this response, please contact Michael Mosier at (856) 339-5434.
I declare under penalty of perjury that the foregoing is true and correct.
Sincerely, Executed on __
I D. F. Grchow Vice Pr sident - Engineering/Technical Support Attachment C-
Document Control Desk 3
2 7 04 LR-N04-0322 OUL. 20 C:
Regional Administrator - NRC Region I U. S. Nuclear Regulatory Commission 475 Allendale Road, King of Prussia, PA 19406 Mr. D. Collins, Project Manager-Salem U. S. Nuclear Regulatory Commission Mail Stop 08C2 Washington, DC 20555 USNRC Senior Resident Inspector-Salem (X24)
Mr. K. Tosch, Manager IV Bureau of Nuclear Engineering 33 Arctic Parkway P.O. Box 415 Trenton, NJ 08625
Document Control Desk Attachment I LR-N04-0322 ATTACHMENT I RESPONSE TO NRC BULLETIN 2004-01 (1) All subject PWR licensees are requested to provide the following information within 60 days of the date of this bulletin.
REQUESTED INFORMATION:
(a)
A description of the pressurizer penetrations and steam space piping connections at your plant. At a minimum, this description should include materials of construction (e.g., stainless steel piping andlor weld metal, Alloy 600 piping/sleeves, Alloy 82/182 weld metal or buttering, etc.), joint design (e.g., partial penetration welds, full penetration welds, bolted connections, etc.), and, in the case of welded joints, whether or not the weld was stress-relieved prior to being put into service. Additional information relevant with respect to determining the susceptibility of your plant's pressurizer penetrations and steam space piping connections to PWSCC should also be included.
PSEG RESPONSE:
The pressurizers at Salem Units 1 and 2 are Westinghouse 1800 cubic foot vessels with cast heads. Review of original design, fabrication and audit documentation indicates that Alloy 82/182/600 was not used for penetrations, steam space piping or welds. Instrument penetrations, heater sleeves and nozzle safe ends were manufactured from type 316 stainless steel. All welds and weld buttering were made using stainless steel weld filler material (309L and 308L). Therefore, primary water stress corrosion cracking (PWSCC) of Alloy 82/182/600 is not applicable to the Salem Unit 1 and 2 pressurizers as discussed in Bulletin 2004-01.
REQUESTED INFORMATION:
(b)
A description of the inspection program for Alloy 82/182/600 pressurizer penetrations and steam space piping connections that has been implemented at your plant The description should include when the inspections were performed; the areas, penetrations and steam space piping connections inspected; the extent (percentage) of coverage achieved for each location which was inspected; the inspection methods used; the process used to resolve any inspection findings; the quality of the documentation of the inspections (e.g., written report, video record, I
Document Control Desk Attachment I LR-N04-0322 photographs); and, the basis for concluding that your plant satisfies applicable regulatory requirements related to the integrity of pressurizer penetrations and steam space piping connections. If leaking pressurizer penetrations or steam space piping connections were found, indicate what followup NDE was performed to characterize flaws in the leaking penetrations.
PSEG RESPONSE:
Based on the review performed in response to item (a) and that Alloy 82/182/600 material is not used in the Salem Units 1 and 2 pressurizers, an Alloy 82/182/600 inspection program need not be implemented or planned.
REQUESTED INFORMATION:
(c)
A description of the Alloy 8211821600 pressurizer penetration and steam space piping connection inspection program that will be implemented at your plant during the next and subsequent refueling outages. The description should include the areas, penetrations and steam space piping connections to be inspected; the extent (percentage) of coverage to be achieved for each location; inspection methods to be used; qualification standards for the inspection methods and personnel; the process used to resolve any inspection indications; the inspection documentation to be generated; and the basis for concluding that your plant will satisfy applicable regulatory requirements related to the structural and leakage integrity of pressurizer penetrations and steam space piping connections. If leaking pressurizer penetrations or steam space piping connections are found, indicate what followup NDE will be performed to characterize flaws in the leaking penetrations. Provide your plans for expansion of the scope of NDE to be performed if circumferential flaws are found in any portion of the leaking pressurizer penetrations or steam space piping connections.
PSEG RESPONSE:
See response to item b above.
REQUESTED INFORMATION:
(d)
In light of the information discussed in this bulletin and your understanding of the relevance of recent industry operating experience to your facility, explain why the inspection program identified in your response to item (1)(c) above is adequate for the purpose of maintaining the integrity of your facility's RCPB and for meeting all applicable regulatory requirements which pertain to your facility.
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Document Control Desk LR-N04-0322 Attachment I PSEG RESPONSE:
As stated above, neither the Salem Unit 1 nor Unit 2 pressurizers utilize Alloy 82/182/600 material; therefore, an inspection plan need not be implemented in response to this Bulletin.
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