ML20009C704
| ML20009C704 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 07/17/1981 |
| From: | Mccaffrey B LONG ISLAND LIGHTING CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| SNRC-597, NUDOCS 8107210375 | |
| Download: ML20009C704 (5) | |
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LONG ISLAND LIGHTING COMPANY 7 $
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J SHOREHAM NUCLEAR POWER STATION 4
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Mr. Harold R. Denton, Director 2I Office of Nuclear Reactor Regulation 4> 7887A (6 y #'
U.S. Nuclear Regulatory Commission
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Washington, D.C.
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'f fif"tp SHOREHAM NUCLEAR POWER STATION - Unit 1 Docket No. 50-322
Dear Mr. Denton:
Enclosed herewith are 60 copies of additional information regarding SER Open Item No. 25, RCIC Temperature Sensors, which was previously identified as requiring clarifying infor mation to complete NRC review.
-If you require additional information or clarification, please do not hestitate to contact this office.
Very truly yours, M/8-N '
B. R. McCaffr Manager, Project Engineering Shoreham Nuclear Power Station...,.
CC/mh Enclosures Ol
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y 8107210375 810717 PDR ADOCK 05000322 E
PDR FC 4935
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Open Item No. 25 NRC Request:
a.
Provide an illustration to show where the temperature sensor elements are located.
b.
Describe why a failure (steam line break) will not isolate both
~~-
Response
a.
See the attached table for the location of the temperature sensor
+
elements.
b.
To the maximum extent possible, the temperature sensor elements are placed to minimize the possibDity of interference between sensors and isolation of both the RCIC and HPCI systems.
In order to be more conservative, for the condition of a break in the RCIC steam i
supply line it is assumed that HPCI also becomes unavailable.and vice versa. This is d,iscussed in detail in FSAR sections 3C.4.3.9 and 3C.4.4.9.
As discussed therein, the plant can nevertheless be safely shut down. Note that each pipe break analysis considers, in addition to consequential effects, the worst single active failure associated with each pipe break.
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HPCI & RCIC TD'PERATURE SENSOR ELD 4 BITS
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i Elevation Radius Tomo. Element Azimuth (ft)
(ft) 1E51*TE 052A 2110-10' 24.06 60.78
-i 1E51*TE 052B 2040-10' 22.54 55.79 1E51*TE 053A 2040-37' 20.42
'B.40 1E51*TE 053B 2190-13' 26.99 61.53 1
l 1E51*TE 054A 1940-26' 71.91 65.18 i
1E51*TE 054B 1970-26' 68.71 65.08 le51*TE 055A 1900-44' 65.38 45.76 9
1E51*TE 055B 1900-28' 64.19 49.46 1E51*TE 055C 1900-12' 69.32 45.22 1E51*TE 055D 190o-49' 71.77 47.73 3E41*TE 053A 190o-43' 37.19 50.72 1E41*TE 053B 1890-10' 37.23 48.19 1E41*IE 054A 2030-15' 24.98 58.97-1E41*TE 054B 2050-36' 24.99 60.81 1E41*TE c56a 193o-56' 69.53 63.15 1E41*TE 056B 1960-07' 67.61 65.12 I
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