ML070950494
| ML070950494 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 04/17/2007 |
| From: | Tam P NRC/NRR/ADRO/DORL/LPLIII-1 |
| To: | Nazar M Indiana Michigan Power Co |
| References | |
| BL-04-001, TAC MC3473, TAC MC3474 | |
| Download: ML070950494 (4) | |
Text
April 17, 2007 Mr. Mano K. Nazar Senior Vice President and Chief Nuclear Officer Indiana Michigan Power Company Nuclear Generation Group One Cook Place Bridgman, MI 49106
SUBJECT:
D. C. COOK NUCLEAR PLANT (DCCNP), UNITS 1 AND 2 - RESPONSE TO BULLETIN 2004-01, INSPECTION OF ALLOY 82/182/600 MATERIALS USED IN THE FABRICATION OF PRESSURIZER PENETRATIONS AND STEAM SPACE PIPING CONNECTIONS AT PRESSURIZED-WATER REACTORS (TAC NOS. MC3473 AND MC3474)
Dear Mr. Nazar:
On May 28, 2004, the U.S. Nuclear Regulatory Commission (NRC) issued the subject bulletin, which informed addressees that current methods of inspecting the pressurizer penetrations and steam space piping connections fabricated from Alloy 82/182/600 materials may need to be supplemented with additional measures (e.g., bare-metal visual inspections) to detect pressurizer penetration and steam space piping connection flaws or leakage. The bulletin requested that addressees provide the NRC with information related to the materials of construction, the inspections that have been performed, and the inspections which will be performed to verify the integrity of the pressurizer penetrations and steam space piping connections.
By letter dated July 26, 2004, and by a supplemental letter dated October 28, 2004, Indiana Michigan Power Company (I&M) provided its responses to Items 1a, 1b, 1c, and 1d of Bulletin 2004-01 for DCCNP-1 and DCCNP-2. I&Ms responses described its materials of fabrication and past, current and future pressurizer penetrations and steam space piping inspection programs at DCCNP-1 and DCCNP-2.
I&Ms response to Item 1a reported that some of the materials used in the fabrication of the pressurizer penetrations and steam space piping connections were Alloy 82/182/600 materials.
This reply required I&M to provide further responses to the remaining items in the bulletin.
In response to Item 1b, I&M described prior inspections and inspection results of pressurizer penetrations and steam space piping connections which had been performed at DCCNP-1 and DCCNP-2. I&Ms response included the basis for concluding that DCCNP-1 and DCCNP-2 satisfy the applicable regulatory requirements related to the integrity of pressurizer penetrations and steam space piping connections.
In response to Item 1c in the bulletin, I&M provided a description of the Alloy 82/182/600 pressurizer penetration and steam space piping connection inspection program that will be
M. K. Nazar implemented at the plant during the next and subsequent refueling outages. The description included the items to be inspected; the percent coverage that would be performed at each location; the inspection methods to be used; the 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 the plant will satisfy the 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, I&M indicated that follow-up nondestructive examination (NDE) will be performed to characterize flaws in the leaking penetrations. I&M provided its 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.
In response to Item 1d in the bulletin, I&M explained why the inspection program identified in the response to Item 1c in the bulletin is adequate for the purpose of maintaining the integrity of the DCCNP-1 and DCCNP-2 reactor coolant pressure boundary (RCPB), and for meeting all applicable regulatory requirements which pertain to the facility.
By letter dated January 6, 2005 (for DCCNP-2) and June 24, 2005 (for DCCNP-1), I&M provided a response to Item 2a of Bulletin 2004-01. These letters provided a statement to the NRC indicating that the inspections described in I&Ms response to Item 1c of the bulletin were completed during a recent outages, and provided a description of the as-found condition of the locations inspected. I&M also described any findings of relevant indications of through-wall leakage and follow-up NDE performed to characterize flaws in leaking penetrations or steam space piping connections. A summary of all relevant indications found by NDE, a summary of the disposition of any findings of boric acid, and a description of any corrective actions taken and/or repairs made as a result of the indications found was also provided in this letter.
The NRC staff has completed its activities associated with the review of I&Ms responses to Bulletin 2004-01 and finds I&Ms response to be acceptable. It should be noted that industry commitments or NRC staff regulatory actions may result in the need for you to modify your plans for the inspection and repair of items discussed in Bulletin 2004-01. It is the NRC staffs expectation that you will revise your plan for the inspection and repair of items discussed in Bulletin 2004-01 consistent with other industry commitments or staff regulatory actions. This closes the NRC staffs efforts with regard to the review of the Bulletin 2004-01 response for DCCNP-1 and DCCNP-2. Please contact me if you have any questions on this issue.
Sincerely,
/RA/
Peter S. Tam, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-315 and 50-316 cc: See next page
ML070950494 OFFICE LPL3-1\\PM LPL3-1/LA CVIB CVIB/BC LPL3-1/BC NAME PTam THarris EAndruszkiewicz MMitchell LRaghavan DATE 4/12/07 4/11/07 4/12/07 4/12/07 4/17/07
Donald C. Cook Nuclear Plant, Units 1 and 2 cc:
Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351 Attorney General Department of Attorney General 525 West Ottawa Street Lansing, MI 48913 Township Supervisor Lake Township Hall P.O. Box 818 Bridgman, MI 49106 U.S. Nuclear Regulatory Commission Resident Inspector's Office 7700 Red Arrow Highway Stevensville, MI 49127 Kimberly Harshaw, Esquire Indiana Michigan Power Company One Cook Place Bridgman, MI 49106 Mayor, City of Bridgman P.O. Box 366 Bridgman, MI 49106 Special Assistant to the Governor Room 1 - State Capitol Lansing, MI 48909 Susan D. Simpson Regulatory Affairs Manager Indiana Michigan Power Company Nuclear Generation Group One Cook Place Bridgman, MI 49106 Michigan Department of Environmental Quality Waste and Hazardous Materials Div.
Hazardous Waste & Radiological Protection Section Nuclear Facilities Unit Constitution Hall, Lower-Level North 525 West Allegan Street P. O. Box 30241 Lansing, MI 48909-7741 Lawrence J. Weber, Plant Manager Indiana Michigan Power Company Nuclear Generation Group One Cook Place Bridgman, MI 49106 Mark A. Peifer, Site Vice President Indiana Michigan Power Company Nuclear Generation Group One Cook Place Bridgman, MI 49106