0CAN129406, Informs That ANO Is Now in Compliance W/Station Blackout Rule
| ML20080D581 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/30/1994 |
| From: | Mims D ENTERGY OPERATIONS, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 0CAN129406, CAN129406, NUDOCS 9501040145 | |
| Download: ML20080D581 (2) | |
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RzrMe, AR 72801 Tcl60185B 5NO December 30,1994 OCAN129406 U. S. Nuclear Regulatory Commission Document Control Desk Mail Station PI-137 Washington, DC 20555
Subject:
Arkansas Nuclear One - Units I and 2 Docket Nos. 50-313 and 50-368 License Nos. DPR-51 and NPF-6 Notification of Compliance with the Station Blackout Rule Gentlemen:
In a letter dated November 24,1993 (OCNA119310), the NRC staff requested that Arkansas Nuclear One (ANO) submit a written notification whenever we were in compliance with the station blackout (SBO) rule. This letter is to inform you that we are now in compliance with the SBO rule. As committed previously, the NUMARC 87-00, Part B.12 testing, which is not required to demonstrate operability of the SBO diesel, will be performed during the Unit I outage in the spring of 1995 and the Unit 2 outage during the fall of 1995.
Additionally, per telephone conversation with the NRR Project Manager for ANO, Units 1 and 2, the NRC was informed of a change in our plans with respect to the testing to be performed on the SBO diesel generator in order to demonstrate its operability prior to December 31,1994. In a letter to the NRC dated June 29,1993 (0CAN069302), ANO outlined the tests which would be performed on the SBO diesel. This letter further stated that any significant deviations from these planned tests would be discussed with the Project Manager. Consistent with our commitment to communicate changes to the NRC, we contacted the Project Manager on November 23,1994, to inform him of the change in our testing plans.
Since ANO-2 is scheduled for a mid-cycle outage in early January 1995, we believe it is prudent to delay tying the diesel to the unit's non-safety 4,160 volt bus until the mid-cycle outage. Although the likelihood of causing a plant transient would be very low, delaying the test for a couple of weeks would remove any chance for challenging the plant unnecessarily while at power. The modified testing program still demonstrates the capability of the SBO diesel generator to perform its SBO requirements, but does not 1
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. OCAN129406 Page 2 require tying the diesel to 'the plant's non-safety'4,160 vok bus during power operations.
The mod,ified test plan was described to the Project Manager'during the November 23rd.
gouference' call. It included a 24-hour endurance run powering a 2500 KVA load cell
- followed by a complete load rejection. The testing has been completed and successfully L demonstrated 'the diesel's capability to perform its station blackout function The -
remaining test - to tie the SBO diesel generator to the non-safety 4,160 volt bus - which was originally anticipated for completion before the end of the year, will be completed during Unit 2's January 95 mid-cycle outage. The ANO-2 test, in addition to verifying the r
ability to tie the SBO diesel generator to an energized bus, will also demonstrate the ~
capability of the machine to perform at rated capacity for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> with a subsequent load rejection.
Also, in accordance with your request as stated in your letter dated November 24,1993 (OCNAl19310), we will notify you, in writing, when we have completed the NUMARC Part B.12 test for ANO-1 and ANO-2.
Should you have questions or comments, please contact me.
Very truly yours,
[hdfC-7V4 Dwight C. Mims Director, Licensing DCM/dwb cc:
Mr. Leonard J. Callan Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Arkansas Nuclear One 1448 S. R. 333 Russellville, AR 72801 Mr. George Kalman NRR Project Manager Region IV/ANO-1 & 2 U. S. Nuclear Regulatory Commission NRR Mail Stop 13-H-3 One White Flint North 11555 Rockville Pike Rockville, MD 20852
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