ML20059D209

Proposed Tech Specs Providing New Location for time-history Accelerograph

ML20059D209
Person / Time
Site:	Braidwood
Issue date:	07/31/1990
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20059D208	List: ML20059D204 ML20059D209
References
NUDOCS 9009060152
Download: ML20059D209 (6)

Text

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TABLE 3.3-7 SEISMIC MONITORING INSTRUMEhiATION

[ MINIMUM L

' MEASUREMENT INSTRUMENTS INSTRUMENTS AND SENSOR LOCATIONS RANGE OPERABLE-

1. Time - History Accelerographs ,

a. Aux. Elect. Rm, 0PA02J N.A. 1

'2. Triaxial Peak Accelerographs j

a. Cont./ Reactor Eq. Accumulators -2 g to +2 g 1

b. Cont./ Reactor piping -2 g to +2 g 1

c. Aux. Bldg./ Cat. I piping . -2 g to +2 g _1 3.: Response-Spectrum Analyzer Aux Elect Rm, OPA02J None 1

4. Triaxial Acceleration Sensors

a. Cont.'/10W - 377' -2 g to +2 g 1

b. Cont /10W - 502' -2 g to +2 g 1

c. Cont./10X - 426' __ _

-2 g to +2 g l' j.

e.

Tifi:S'2^

Aux. B Wg./IBN'- ^ ^^L T26'41 * ^^! D

^ --

-2 g to +2 g 1

- -2 g to +2 g i

f. Aux. Bldg./18L - 338' -2 g to +2 g ,1 >

d . Free. Fit l d [ 31 + 015 2 3 4 + /SAE l

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9009060352 900731 :i -

PDR ADOCK 05000456 P PNU F.:

BRAIDWOOD - UNITS 1 & 2 3/4 3-45'

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INSTRUMENTATION l

BASES I 3/4.3.3.2 MOVABLE INCORE ETE0 TORS The OPERABILITY of the movable incore detectors with the specified minimum complement of equipment ensures that'the measurements obtained from use of this system accurately represent ther spatial neutron flux distribution of the core.

The OPERABILITY of this system is demonstrated by irradiating each detector VMd and determining the acceptability of its voltage curve.

For i.ne purpose of measuringn F (Z) or Fh a full incore flux map is used.

Quarter-core flux maps, as defined in WCAP-8648, June 1976, may be used in recalibration of the Excore Neutron Flux Detection System, and full incore l flux maps or symmetric incore thimbles may be used for monitoring the QUADRANT:

POWER TILT RATIO when one Power Range channel is inoperable.  !

3/4. 3. 3. 3 SEISMIC INSTRUMENTATION The OPERABILITY of the seismic instrumentation ensures capability is available to promptly determine the magnitude of a seismic event f that suf'ic and evaluate the response of those features.important to safety.

is required to permit comparison of the measured response to that used in theThis design basis for the facility to determine if plant shutdown is required pursuant to Appendix A of 10 CFR Part 100.

a playback ometers. unit, three peak recording accelerometers, an The above-mentioned e the Auxiliary Electrical Room. quipment,. excluding the sensors, is located in three ia containteotm i The remaining sensors are located as follows:

I

( locatio v _ 00L X '000.')TheAuxiliary tw Ln the Building, and one at the free field peak recording eccelerometers are passive devices which have W interplay on the rest of the system and are located on reactor equipment, reactor piping..and outside containment on the. Category I piping. l' The triaxial accelerometer is based on three orthogonal force-balanced servo-accelerometers which generate a voltage signal upon stimulation. The Electrical Room, digitized, and recorded on magnetic tape. v signals and system data interface.The time-history recorder is the master actuate the system. It also contains the system triggers used to The master control unit continually monitors two of the to the system actuation level. sensor inputs, which are processed through the to record both pre and post-seismic event data.The time-history recorder also has the system is the response spectrum analyzer. The other key component in the the maximum .esponse of a single-degree-of-freedom system system versu natural frequency of vibration when either of two designated triaxial accelero-meters is subjected to a time-history motion of the accelerometer.

3 8 t oi s , 3 *f + is c BRAIDWOOD - UNITS 1 & 2 B 3/4 3-4

t ENCLQSURES FOR l ERQPOSED CHANGES TO APP gpl u .

TECHNICAL SPECIFICATIONS OF IA",'LITY OPERATING LICENSES NPF-72 AND NPF-77 i

1 ENCLOSURE 1: PANORAMIC VIEW' ENCLOSURE'2: ' OVERHEAD VIEW i ENCLOSURE'3: UFSAR FIGURE 2.5-21'

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