ML20062D333

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Forwards Response to Nrc'S Request for Addl Info Re Installation of Analog Transmitter/Trip Unit Sys(Attus).Info Supports Appl for Amend to 780810 Oper Lic Suppl by 781010 Info
ML20062D333
Person / Time
Site: FitzPatrick Constellation icon.png
Issue date: 11/16/1978
From: Early P
POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To: Ippolito T
Office of Nuclear Reactor Regulation
References
JNRC-78-58, NUDOCS 7811210389
Download: ML20062D333 (6)


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4 POWER AUTHORITY OF THE STATE OF NEW YORK 10 CoLuMaus CIRCLE NEW YORK, N. Y.10019 (212) 397-6200 -

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vs . CM A as u NA smAL KSCHARD M. FLYNN WILSUR L. GRONSERG EOSERT L MILLONZA MANAS N IN... NG w LuAM F.LUDoy November 16, 1978 aoNN w.sosrou JNRC-78-58 To":.i'"J.'Ari.N.

mOMA,sygR, ANN. JR.

Director of .iuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D. C. 20555 s

Attention: Mr. Thomas A. Ippolito Operating Reactors Branch No. 3 Division of Operating Reactors

Subject:

James A. FitzPatrick Nuclear Power Plant Analog Transmitter / Trip Unit System (ATTUS)

Docket No. 50-333

Dear Sir:

Enclosed is the Power Authority's response to the Nuclear Regulatory Commission's request for additional information regarding installation of the ATTUS at James A. FitzPatrick Nuclear Power Plant. This inform-ation is in support of the Authority's Application for Amendment to the Operating License dated August 10, 1978, as supplemented by additional information transmitted on October 10, 1978.

Very truly_yours,

, s.

Paul J. Early Assistant Chief Engineer-Projects Enc.

781121 0 3 0 S o\

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RESPONSE TO USNRC REQUEST FOR ADDITIONAL INFORMATION ON TIIE ANALOG TRANSMITTER / TRIP UNIT SYSTEM (ATTUS) INSTALLED AT JAMES A. FITZPATRICK NUCLEAR POWER PLANT Question 1: Indicate location and transmitter model number-and qualification information.

Response: The transmitters are the Rosemount Model ll51GP9A22MBGE3 installed at elevation 300 feet inside the Reactor Building on a Drywell wall mounted rack. The trans-mitters were qualified for essential use and the qualification data is shown in Tables 4-2, 4-3, 4-4 and 4-5 of General Electric Company's NEDO-21617 issued in April 1977.

Question 2: Indicate location and model number of the s

calibration unit.

Response: The calibration units are located in the Trip Unit / Calibration System file which is mounted within a modified "Hoffman" enclos-

' ure to improve seismic adequacy. These enclosures are wall mounted at 300 feet elevation within the Reactor Building. The calibration units are Rosemount Part No.

510DU005.

Question 3: Provide environmental condition at the location of the Trip Unit System.

Response: The maximum temperature, humidity, and radiation expected during normal operation of the plant are 750F temperature, 60 to 70% humidity, and 1 to 3 millirem per hour.

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' Since this system needs to be in operation during normal operation of the plant, and to give the trip input to scram the reactor only, we do not expect that the system will be exposed to an environmental condition which could have deleterious effects on the function of the system during a Design Basis Accident.

The Analog Transmitter / Trip Unit System does not need to be in operation after the postulat- -

ed accident.

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L

- o Question 4: Indicate if the installation of the Analog.

Transmitter / Trip Unit 5ystem (ATTUS) at the

~

. JAFNPP affects the capability of the in-strumentation to monitor reactor pressure during and fo.' lowing an accident as per-Regulatory Guide 1.97. If not, indicate available instrumentation to monitor the reactor pressure during and following an accident.

Response: Addition of ATTUS will not affect the ability to monitor reactor pressure during and following an accident. It should be noted that the Analog Transmitter / Trip Unit System is only a more sophisticated set of replacement hardware for mechanical

- sensor switches. Implementation of this hardware into the RPS logic system only affects the system at the sensor level, not the logic level. Since the four. channel scheme is not altered, the safe and reliable operation of the reactor high pressure trip system is not compromised.

Instrume,ntation, manual initiation and protective action of the essential system (ECCS) remains unchanged with this particular modification. The ECCS instrumentation and' those essential to monitor the plant condition during and after a DBA remains of equal status whether this hardware is used or not. Some of the instruments used to monitor the-reactor vessel following an accident are, in addition to the ECCS

,' instruments,-the following:

s Location Signal Indication Inst. # @CR From Location Reactor A 25-5 Level / Pressure PR-06-97 9-05 PT-6-53B 25-6 Reactor Pressure PR-06-98 9-05 PT-06-58 25-6 Renctor Water Level LI-2-3-91 9-03 LITS-2-3-73 25-51 Reactor Pressure PI-06-90h 9-05 PT-06-53B 25-05/25-06 1

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