ML071720219
| ML071720219 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 06/28/2007 |
| From: | Tam P NRC/NRR/ADRO/DORL/LPLIII-1 |
| To: | Nazar M Indiana Michigan Power Co |
| tam P, NRR/ADRO/DORL, 415-1451 | |
| References | |
| TAC MD3161 | |
| Download: ML071720219 (4) | |
Text
June 28, 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, UNIT 2 (DCCNP-2) - REQUEST FOR ADDITIONAL INFORMATION RE: PROPOSED AMENDMENT INVOLVING REACTOR TRIP ON LOW TURBINE OIL PRESSURE (TAC NO. MD3161)
Dear Mr. Nazar:
In a letter dated September 15, 2006, Indiana Michigan Power Company (I&M) requested an amendment to the Technical Specifications (TSs) for DCCNP, Unit 2, to revise the allowable value of the reactor trip on low turbine oil pressure to $750 pounds per square inch gauge (psig) from its current value of $57 psig. On January 11, 2007, we e-mailed to your staff a draft request for additional information (RAI), publicly available at Accession No. ML070110441). By letter dated April 20, 2007, Mr. J. N. Jensen responded to that draft RAI.
We reviewed the April 20, 2007, response and determined that additional information is still needed. We have previously e-mailed this RAI in draft form (Accession No. ML071350660) and have received no comments. Accordingly, the draft RAI had been made into its final form (see enclosure). In order to complete our timely review of your amendment application, we request your response within 30 days from the date of this letter.
Feel free to contact me if you need clarification of this RAI.
Sincerely,
/RA Mahesh Chawla for/
Peter S. Tam, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-316
Enclosure:
RAI cc: See next page
ML071720219 OFFICE LPL3-1\\PM LPL3-1/LA EICB/BC LPL3-1/BC (A)
NAME PTam MC for THarris AHowe TTate PM for DATE 6/21/07 6/28/07 5/7/07 6/28/07
REQUEST FOR ADDITIONAL INFORMATION D. C. COOK NUCLEAR PLANT, UNIT 2 PROPOSED AMENDMENT RE: REACTOR TRIP ON LOW TURBINE OIL PRESSURE After reviewing the information provided in an Indian Michigan Power (I&M) letter dated April 20, 2007, the Nuclear Regulatory Commission (NRC) staff has determined that additional clarification is needed. Therefore, the staff requests a response to the following questions:
(1)
The I&M response to NRC Request 2 states that out-of-tolerance is defined as exceeding the band established around a desired value.... However, I&M has not defined how this band is established. Provide information that describes the uncertainty elements that are included in the out-of-tolerance band, the basis for their inclusion, and how the tolerance band is calculated.
(2)
The I&M response to NRC Request 2 (first paragraph) discusses actions for an as-found condition that exceeds the calibration tolerance. However, I&M has not defined how the calibration tolerance is determined. Provide the information about the uncertainties included in the calibration tolerance band, basis for their inclusion, and how the band is calculated.
(3)
The I&M response to NRC Request 2 (on page 3, first full paragraph) provides an example of Unit 1 calibration tolerance, but did not state that the same value has been used for Unit 2 also, and how it was determined. Provide the calibration tolerance band for Unit 2.
(4)
The I&M response to NRC Request 2 (on page 3, first full paragraph) states that the out-of-tolerance evaluation may include changes to the acceptance criteria, changes to the switch design or calibration method (including the setpoint value), or the replacement of poorly performing components, but did not provide any detail on how the evaluation results are determined, who makes that determination, and how soon this evaluation is to be completed. Provide the missing information.
ENCLOSURE
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 Joseph Jensen, Site Vice President Indiana Michigan Power Company Nuclear Generation Group One Cook Place Bridgman, MI 49106