ML19317H390
| ML19317H390 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 05/29/1980 |
| From: | Rhode G NIAGARA MOHAWK POWER CORP. |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19317H391 | List: |
| References | |
| NUDOCS 8006030471 | |
| Download: ML19317H390 (2) | |
Text
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NuMOHAWK Y NIAGARA NIAGARA MOHAWK POWER CORPORATION /300 EP;E BCULEVARD %EST 3 r AAOUSE. N Y.13202/TELEPrCNE (315) 4741511 May 29, 1900 Director of Nuclear Reactor Regulation Attn.: Mr. Thomas A. Ippolito, Chief Operating Reactors Branch #2 U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Re: Nine Mile Point Unit 1 Docket No. 50-220 DPR-63 Your letter of April 28, 1980, requested additional information regarding the containment vent and purge system at Nine Mile Point Unit 1.
The attachment to this letter addresses your request.
Very truly yours, NIAGARA MOHAWK POWER CORPORATION Gerald K. Rhode Vice President System Project Management MGM/kmb Attachment t
8N06080 Y Y/
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Nine Mile Point Unit 1 Response to Request of April 28, 1980 Regarding Containment Vent and Purge System 1.
Question Provide the following drawings:
a.
C-19438-C; elenentary diagram for valves IV-201-07, IV-201-09, IV-201-17, and IV-2GI-31.
b.
C-19954-C, sheet 5; switch SS-ll development.
c.
C-19954-C, sheet 7; switch 3SSA development.
d.
Switch development for the containment isolation individual valve position switches.
Response
The requested drawings are attached.
2.
Question Describe radiation monitors for the containment ventilation and/or purge system (s) in accordance with the requirements of Section 7.3 of Regulatory Guide 1.79.
This information should include, but not be limited to, the qualification information (per Sections 3.10 and 3.11 of Regulatory Guide) and the wiring diagrams for the output relays.
Response
The discharge from the primary containment vent and purge system at Nine Mile Point Unit 1 is routed through the emergency ventilation system to the stack. There are no radiation monitors directly associated with the containment vent and purge system. However, the stack effluent monitoring system is used to monitor the activity being released. Alarms would activate when Technical Specification limits were reached.
The purge would then be terminated.
In addition to the monitoring capabilities of the stack effluent monitoring system, a grab sample is taken on each purge and analyzed.
The stack effluent monitor is described in Section VII C.3.1.2 of the FSAR. - This-is not a category I system. The system was designed to meet the maximum ambient conditions of 140F and 98 percent-relative humidity (drawing C-22025-C, Sheet 2, attached).
-The stack effluent monitoring system is being modified as required by NUREG-0578 to cover an increased range of monitoring capability.
.L