ML20035E056
| ML20035E056 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 04/08/1993 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Poslusny C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9304140224 | |
| Download: ML20035E056 (6) | |
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GENuclear Energy I
we veer comi.cnv i:: m % na Se Lse c.;35??S l
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April 8,1993 Docket No. STN 52-001 I
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Chet Poslusny, Senior Project Manager i
Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation l
Subject:
Submittal Supporting Accelerated ABWR Review Schedule - DFSER Open l
Item 7.7.1.15-1 i
Dear Chet:
Enclosed is a SSAR markup addressing DFSER Open Item 7.7.1.15-1.
Please provide a copy of this transmittal to Jim Stewart.
Sincerely, Jack Fox Advanced Reactor Programs cc: Norman Fletcher (DOE)
Manny Patel(GE)
Bob Strong (GE)
JI9345 9304140224 930408 PDR ADOCK 05200001 A
i, ABWR 2-u Standard Plant arv a 9.5.2 Communication Systems a control board, amplifiers, amplifier boards, 48V battery, battery chargers, de distribution The ABWR Standard Plant design provides a tele-board, cables wiring materials, junction boxes phonic communication system consisting of a power and jacks. The system is a 3 channel,3 system actuated paging facility and a separate network split type design with a separate set of amplifi-of cables and jacks to facilitate use of sound-ers and a distribution board for each branch. A powered telephones for maintenance and repair. general outline of the system is shown in Figure 9.5-2.
l See Subsection 9.5.13.11 for COL applicant information pertaining to criteria for the design Handsets and speakers are installed in places of plant security system.
which are important for plant operation and nec-essary for personnel safety, and where communica-9.5.2.1 Design Bases tion is frequent including the rooms described below:
l 9.5.2.1.1 Power-Actuated Paging System (1) Main Control Room The paging system is designed to provide fa-cilities for mutual communication and simulta- (2) Electrical Equipment room i
neous broadcasting in the related buildings of tbe plant.
(3) Fuel replacement area i
9.5.2.1.2 Sound-Poweml Telephone System (4) Turbine operation area The design basis for the sound powered tele-(5) Periphery of control rods hydraulic units phone system is to provide communication prima-rily for fuel transfer, testing, calibration,.and- (6) h%ter Pump Room g s4 em co a;4,,,,, '
maintenance a
(7) Elevators 9.5.2.2 Description
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(8) Exteriors of plant buildings j
9.5.2.2.1 Paging Facilities Each handset station can be used to communi-This system provides communication means such cate with any other handset station or the as ringing, mutual telephonic communication and central station of an another unit at the same simultaneous broadcasting in various select build-nuclear station.
l ings and areas including outdoor locations of a l
nuclear power plant unit. The system also per-One circuit of the handset station is con-mits merging with and separation from other units nected to a telephone line, thereby, permitting of the nuclear power station. The system is pri-a simultaneous broadcasting from a security tele-marily used for intraplant communications and a phone unit. In addition to the basic paging fixed-type (as opposed to wireless communication) function the equipment can be used for an emergency communication during plant operations, automatic surveillance of main amplifier output, testing, calibration, start-up and limited emer-alarm indication in the event of failure of main gencies.
equipment and manual switching to spare amplifier as necessary.
The paging facilities system is a non safety system and, therefore, does not have seismic The system is operated from a 48V battery mounting requirements. Mounting of system compo-source with a normal and a spare battery charg-nents is not on or above seismic class equipment, ers. The chargers are fed from 34,440VAC sta-and is in accordance with sound design engineer-tion power supply and a separate Ip',120VAC ing practices.
power source is used for panel lights and receptacles.
The paging facilities consist of handsets, speakers, branch boxes, main distribution boards, 9.5-2 Amendment 23
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.ANR zwtomt Standard Plant nev. s Due to its importance to plant operation and Junction boxes installed outdoors are made
- safety the paging equipment will have an exclu-of stainless plate in accordance with the sive DC power supply with a dedicated battery.
outdoor specifications. Junction boxes in-The battery has capacity for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> of op-stalled within building are constructed to eration following the loss of AC power. The prevent water damage from above.
charger is sized to recharge the battery form a fully discharged condition in 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> while sup-The interconnecting cables consist of a stan-plying the normal DC loads.
dard pair of conductors with cross-linked poly-ethylene insulation, a static electricity shield i
and an overall sheath of flame and heat A handset is located at the same relative posi-resistant PVC (colored yellow).
tion on each floor, at a conspicuous location in the patrol route, at uniform intervals in corri-The circuits from the main paging equipment dors and large rooms, close to panels where pos-to each junction box are wired by separate sible and at a location least affected by radioac-routes. Wiring is routed in existing cable tivity within one area.
trays for control cables. Containment penetrations X-102 A and B are used for Paging equipment for outdoor facilities is de-communication cables which are routed to the signed to automatically limit the sound volume at communication circuits within containment.
night to a level manually set from the operator's desk. The manual volume settings can be 10,20, 9.5.2.2.2 Sound.Powmd Telephone System for 30 or 40 dB.
Plant Maintenance and Repair The paging equipment produces an emergency sig-A separatc ' ','-. communication system us-l nal(siren sound) upon actuation of an emergency ing portable sound-powered telephone units will signal pushbutton.
be provided.
e v L 4. w t y e n cy c e d k o w SMA as o#wahm(vom RSS.
Box-type speakers are installed in small rooms The communic ion facilities for use during I
I where reverberations make hearing difficult.
plant maintenance onsists of local terminal 4
jacks and boxes and esystem anais, communication I
Speakers and handsets are installed at the board 5with storage for patch cords. The best practical distance from noise sources. How-portable sound-powered telephones themselves are ever, in rooms where noise level increases during out of the ABWR Standard Plant scope.
equipinent operation, (such as feed water pump room, diesel generator room etc.), handsets are The system provides communication capability enclosed within a sound-proof booth.
between boards in the main control room, between the main control room and field stationQ.ee--
" " " "--- or from field station to The speakers are of two different types as de-scribed below. Their sound to noise (S/N) ratio field station.d::E; :a.:b; :;d p::' d6 is approximately 3 to 6 dB.
- - p:..;. J A y:.m.
S:
Output sound pressure of speaker.
An outline of the system is shown in Figure 9.5-2.
N: Noise level at a place where the speaker is 1
installed.
The communication between stations ef-+be-m:xxa axx;;E.. 5:":q is by means (1) Horn shaped (Trumpet shaped): Output of 5 to of portable telephone units and patch cords at 15W the meia&eanese communication system board.
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(2) Cone shaped (box Type):
Output of 3W Terminal jacks are attached to the central control boards and to local panels and racks where communication links are frequently (3) Junction Box i
required t.* s U w y c.aMuwke n 3 rnehta. nan a. p A M op m h c
M$
- 95 2a AmeMmem 22
i ABWR 234aoorn Standard Plant arv n 1
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The cable for the maintenance communication fa-(independent of the normal plant communication j
'cility is unshielded with a flame and heat resis-system) are out of ABWR standard plant design l tance PVC sheath and cross. linked polyethylene in-scope. The COL applicants design shall comply sulation. The cables are routed in existing con-with the BTP CMEB 9.5-1, position C.S.g(3) and trol voltage level cable trays where available.
(4). The COL applicant will supplement this The wiring used for this system is color coded subsection accordingly as applicable. See and the color of the sheath is black.
Subsection 9.5.13.14 for COL license information.
9.5.2.3 System Operation The telephonic communication systems are de-signed to assist the plant personnel during preoperational, start up, testing, maintenance and umeed emergency conditions. The system pro-vides easily accessible means of communications t
between various intraplant locations and simulta-neous broadcasting in those locations.
The various equipment involved in system op-eration is designed to function in the environ-
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ment where is located. The power supply for the Pjtg i
system is derived from the dedicated batteries, thus providing a reliable source of power and the communication system for up to 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> in the event of a loss of plant power supply. %f. Souw A-f80 M W 'PO 4-8'15 ed4sN4 pow 64 soeca. t;o of 4rede.ns. 95hm.
det$ vwt Wh 9.5.2.4 Safety Evaluation L
j The communication system has no safety.related function as discussed in Section 3.2. However, see Subsection 9.5.13.2 for COL license information pertaining to use of the system in l
emergencies.
9.5.2.5 Inspection and testing Requirements The communication systems are conventional and have a history of successful operation. Routine use of parts of the system during normal op-eration ensures availability. Measurements or i
tests required to guard against long-term dete-rioration shall be performed on a periodic basis. See Subsection 9.5.13.3 for COL license information pertaining to communication equipment maintenance and testing procedures.
9.5.2.6 Portable med Flaed Emergency Communication Systems The portable radio communication system, and the fixed emergency communication system a
9.5-2b Amendment 26
ABWR m eioarn
. Standard Plant mn
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Th,e portions of the flooder pipe that extend 9.5.12.5 Instrumentation Requirements from the steel liner it the lower drywell meet the requirements of ASME Class 2 piping The LDF operates automatically in a passive components.
manner during a severe accident scenario that
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involves a core melt and vessel failure. No An ANSI B16.5 stainless steel weld. neck flange operator action is required; therefore, no (or equivalent) is used at the interface between instrumentation is placed upon the system. An the flooder pipe and the fusible plug valve. The inadvertent opening or leak would be detected by flooder pipe is made of the same material as the the lower drywell leak detection system and the l
blowdown vent pipe or of a stainless steel suppression pool water level instrumentation material that is compatible for welding to the which would result in plant shutdown.
blowdown vent pipe.
During severe accidents, operation of the LDF The fusible plug is required to open fully is confirmed by other instrument readings in the when the outer metal temperature of the valve containment. These instruments include those reaches 260 C during a severe accident and to which would record the drywell temperature pass a minimum of 10.51/see with 375 mm of water reduction and the lowering of suppression pool above the valve infat.
water level.
A plastic cover on the valve outlet seals the 9.5.13 COL License Information valve from the intrusion of moisture that could cause corrosion of the fusible metal material.
9.5.13.1 Contamination of the DG Combustion The glastic cover has a melting p,oint below Air intake 130 C and greater than 70 C and is required to melt completely or offer minimal The COL applicant will take measures to l resistance to valve opening when the opening restrict contaminating substances from the plant temperature is reached.
site which may be available to the diesel generator air intakes. (See Subsection 9.5.8.1).
l 9.5.12.4 Testing and Inspection Requirements -
9.5.13.2 Use of Communication System in The ability of the LDF to mitigate severe Emergencies accidents by passing sufficient water to cover
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and quench the postulated corium in the drywell Procedures for use of the communication is confirmed by PRA analysis (Appendix 19D).
system [ emergencies shall be provided by the COL applicant. (See Subsection 9.5.2.4).
No testing of the LDF system will be required during normal operation. During refueling 9.5.13.3 Maintenance and Testing Procedure for outages, the following surveillance would be Communication Equipment required:
Maintenance and testing procedures for the (1) During each refueling outage, verify that plant communication shall be provided by the COL there is no leakage from the fusible plug applicant. (See Subsection 9.5.2.5) valve flange or outlet when the suppression pool is at its maximum level.
9.5.13.4 Use of Portable Hand Light in Emergency (2) Once every four refueling outages, lower suppression pool water level or plug the The portable scaled beam battery powered hand flooder pipe inlet and replace two fusible light (used by the fire brigade and other per-plug valves. Test the valves that were sonnel during an emergency to achieve a plant removed to confirm their function. This shutdown) is out of ABWR standard design scope.
practice follows the precedent set for The COL applicant's design will comply with the in-service testing of standby liquid control BTP CMEB 9.5-1, position C.S.g(1) and (2). The I
system (SLCS) explosive valves in earlier COL applicant will supplement this subsection boiling water reactors, accordingly as applicable.
9 5-10.5 Amendment 23