B16246, Provides NRC Staff W/Changes to Bases Section 3/4.4.9 on Use of Safety Injection Pumps During Modes in Which Cold Overpressurization Protection Sys Analysis Restricts Use of Pumps to Inject Into RCS
| ML20135A043 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 02/20/1997 |
| From: | Brothers M NORTHEAST NUCLEAR ENERGY CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20135A047 | List: |
| References | |
| B16246, NUDOCS 9702260425 | |
| Download: ML20135A043 (5) | |
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(860) 447-1791 Fax (860) 444-4277 The Northeast Utilitie system f5 20 W Docket No. 50-423 B16246 Re: 10CFR50.59 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Millstone Nuclear Power Station, Unit No. 3 Chanae to Bases Section 3/4.4.9 Northeast Nuclear Energy Company (NNECO) is providing the NRC Staff with changes to Bases Section 3/4.4.9 for information only. These changes have been reviewed and approved by the Millstone Unit No. 3 Plant Operating Review Committee on February 8, 1997, in accordance with the provisions of 10CFR50.59.
Description of Chanae The changes to Bases Section 3/4.4.9 provides clarification on the use of safety injection pumps during modes in which Cold Overpressurization Protection System analysis restricts the use of these pumps to inject into the reactor coolant system. The changes to the Bases Section provide five examples of meeting the analysis restriction of ensuring by the use of two independent methods, that the safety injection pumps are incapable of injecting into the reactor coolant system.
Additional Information The need to change Bases Section 3/4.4.9 was the result of our current efforts to review the licensing documents associated with Millstone Unit No. 3. This review revealed inconsistencies between the analysis of the Cold Overpressurization Protection System, Millstone Unit No. 3 Technical Specifications, Bases Section 3/4.4.9, plant procedures and the Safety
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Evaluation Report (SER). The SER states that power is removed from the safety injection pumps whenever Low Temperature Overpressurization Protection is
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required. However, in practice the safety injection pumps are isolated from the i
reactor coolant system and run for testing or for filling the accumulator when the l
plant is in modes 4, 5 and 6.
This submittal corrects these inconsistencies.
NNECO will provide the NRC Staff with changes to the Technical Specifications -
of Millstone Unit No. 3 to address safety injection pump operation in modes 4, 5, and 6.
if you have any questions, please contact Mr. J. M. Peschel at (860) 437-5840.
l Very truly yours,
{
NORTHEAST NUCLEAR ENERGY COMPANY N
N M.H. B'others r
Vice President - Millstone Unit No. 3 Attachment cc:
H. J.
Miller, Region i Administrator W.D. Travers, Dr., Director, Special Projects J. W. Andersen, NRC Project Manager, Millstone Unit No. 3 A. C. Cerne, Senior Resident inspector, Millstone Unit No. 3 i
Docket No. 50-423 B16246 t
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l Millstone Nuclear Power Station, Unit No. 3 NNECO's Commitments i
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U.S. Nucl::r Regulatory Commission l
B16246%ttachment 1\\Page 1 i
Enclosure List of Regulatory Commitments l
The following table identifies those actions committed to by NNECO in this l
document. Any other actions discussed in the submittal represent intended or planned actions by NNECO. They are described to the NRC for the NRC's l
information and are not regulatory commitments. Please notify the Manager -
Nuclear Licensing at the Millstone Nuclear Power Station Unit No. 3 of any l
l questions regarding this document or any associated regulatory commitments.
Commitment Committed Date or Outage NNECO will provide the NRC Staff with changes to the Prior to Startup Technical Specifications of Millstone Unit No. 3 to address safety injection pump operation in modes 4, 5, and 6.
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