ML19323C413

Conceptual Design of Beaver Valley Power Station Technical Support Ctr.

ML19323C413
Person / Time
Site:	Beaver Valley
Issue date:	05/02/1980
From:	DUQUESNE LIGHT CO.
To:
Shared Package
ML19323C409	List: ML19323C408 ML19323C413
References
NUDOCS 8005150499
Download: ML19323C413 (11)

Text

r DUQUESNE LIGHT COMPANY Power Stations Department Conceptual Design of the Beaver Valley Power Station Technical Support Center May 2, 1980

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CONCEPTUAL DESIGN OF THE BEAVER VALLEY POWER STATION TECHNICAL SUPPORT CENTER I. Background and Summarv The Office of Nuclear Reactor Regulation of the U.S. Nuclear Regulatory Commission established the IMI-2 Lessons Learned Task Force .

shortly after the TMI-2 accident in the spring of 1979. The purpose of '

the Task' Force is to identify and evaluate those safety concerns raised by the TMI-2 accident that require generic licensing actions. In July, 1979, the Task Force issued its first report, NUREG-0578, "TMI-2 Lessons Learned Task Force Status Report and Short-Term Recommendations."

NUREG-0578 contains 23 specific recommendations in 12 areas which are to be implemented in two stages over the 18 month period following publica-tion. One of the recommendations of NUREG-0578 is the establishment of an onsite Technical Support Center (Section 2.2.2(b)).

This report describes Duquesne Light Company plans and actions for the Onsite Technical Support Center (TSC) building, plant monitoring equipment and communications equipment for the Beaver Valley Power Station.

While every specific recommendation related to the construction and equip-ping of Technical Support Centers cannot be embodied in a design suitable to this site, every effort has been made to incorporate into the design those features which satisfy the intent of the requirements set forth for this item including the NRC " Staff Position on Emergency Response Facilities. Special consideration hac been given to habitability and use-fulness of the facility during accident conditions. The TSC building, as designed for the Beaver Valley site, will also serve as the Emergency Operation Facility.

The specific design concept for the Technical Support Center can be summarized as follows:

Location - The site of the Technical Support Center was chosen to take advan. age of existing terrain 'eatures for shielding, to provide easy access and space to locate support trailers, and because of limited site space closer to the control room. The Technical Support Center will be located appr~oximately 1200 feet from the Unit 1 control room.

Additional measures are planned to establish " management presence" in the control room and to address the NRC concern requiring a location in "close proximity" to the control room.

Architectural Featurea - The building will be a substantial structure constructed provision forofthe reinforced concrete following /ccncrete block and will contain functions:

. 1. Techical Support Center

2. Emergency Control Center

3. Emergency Communications Center 9

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Conceptual D cign of tha B :vsr Vellcy Pewsr Station Technical Support Center Page 2

1. . Background and Summarv (continued)

4. Near Site Operations Center

5. Dosimetry Facilities

6. Sample Preparation Room and Counting Room

7. Mobile Counting Equipment

8. Other Ancillary Functions

• Shielding - Normally occupied areas of the building will be designed to meet General Design Criteria 19 for a DBA. In addition, extra shielding will be provided for the dosimetry facility, the sample preparation room and the counting room to assure the availability of those facilities during accident conditions and to protect build-ing occupants from the effects of a sample handling accident, should one occur within the laboratory area.

Ventilation - The ventilation system will be arranged so that the building is isolable from the outside air. Further, the sample preparation room and counting room ventilation shall be isolable from the remainder of the building. Normal supply air to the build-ing will be filtered through HEPA filters, and charcoal filters will be utilized in the recirculation mode.

Plant Manitoring Instrumentation - The information will be provided by two process computers, one associated with plant parameters and the other associated with environmental parameters. These computers will be in addition to the normal plant computer. Draft Regulatory Guide'l.97, Revision 2, was used as a guide for recommended parameters to be available in the Technical Support Center. Display will be CRTs with capability to trend up to 20 parameters on graphic strip chart recorders. As a minimum, all data required to be transmitted to the NRC will be available in the TSC.

Communications Equipment - Communications equipment will consist of radio equipment sufficient to communicate with local environmental monitoring groups and with local emergency agencies. Substantial telephone service via Bell Telephone and a 100 line switchboard on the Duquesne Light Compa,y PAX system will be provided.  !

II. Siting and Architectural Features I The Technical Support Center Building will be located approximately 1200 feet from the Beaver Valley Power Station control room. This site is illustrated on the Property Development, Plan attached as Figure 1. This site was chosen to take advantage of the natural shielding from containment

" shine" afforded by the existing north-south highway embankment immediately adjacent to the proposed building site. Also, the distance from the plant is such that the postulated accident cloud dose is reduced at this site to j Jevels which do not require massive shielding within the structure. This  !

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• Conccptuni D20ign of th2 Basvar Valley Pow r Station Technical Support Center Page 3 II. Siting and Architectural Features (continued) site allows good access from offsite and has ample parking space for emergency vehicles and trailers. Direct site roads exist between this site and the control room allowing transport by auto between the two points in less than 3 minutes. This travel time is comparable to the walking time from the control room to other possible sites within the plant security boundary.

Access to the control room will be enhanced by extsnding the plant security boundary to the TSC building by providing security escorted transportation between the TSC and the control room, thus eliminating the requirement to process through plant security for properly cleared individuals. Further, space will be made available in the control room for two NRC personnel, two NSSS personnel and two DLC management person-nel during accident conditions. Direct communications will be provided between each of these individuals and their counterparts in the TSC building.

The main control board television camera installed as part of the interim TSC will be retained for the permanent TSC. These cameras will have tilt, pan and zoom controls which will allow TSC personnel to observe control room activity as well as to provide backup to the TSC data acquisition system. In addition, a TV camera will be installed in the TSC with a monitor in the control room which will provide " picture phone" style communications between the two facilities. This arrangement is intended to enhance management presence in the conrol room,as well as to provide a means for ceastantly monitoring control room activity. This arrangement best suits the need for technical and NRC personnel to have personal access to control room instrumenation and personnel. The design of TSC instrumentation is believed to be good enough that the need for access to the contro) room to obtain data will be minimized. We believe that this balanced approach will minimize confusion which would inevitably occur if free access to the control room was required by large numbers of individuals not actually required for plant operation.

The building has been sized to permit occupancy of the technical support center room by a minimum of twenty-five individuals with adequate desk and table space to allow easy use of the facility. Directly adjoin-ing the TSC room will be the emergency control center room and the commu-nications room. These two rooms will be collectively known as the near site Emergency Operations facility. All offsite emergency plan activity will be controlled from these two rooms. Additional office space in this building will be made available for federal, state and local emergency personnel so as to have a single center for the overall coordination of the entire emergency effort, and to allow such representative direct access to the data available at the facility. Conference room facilities will be available for consultation and briefings.

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• Conceptuel D2cign of tha Basvar Vellsy Powar Station Technical Supp:rt Crnter Page 4 II. Site and Architectural Features (continued)

A records room will be provided with current copies of plant drawings, procedures, instruction books and other information appropriate to emergency operations. Reproduction facilities will be available to facilitate use of the documents.

The building is planned to be used during nonemergency periods as quarters for engineering personnel. This nonemergency use of the facility has the advantages of providing for the assurance of continuing operability of building support systems and for the maintenance of up-to-date drawings and records for emergency use. The facility will also be used to train plant operations and emergency personnel where the Technical Support Center data acquisition system and displays will be particularly useful. In no way will these alternate uses of the facility interfere with the primary purpose of the building.

The Technical Support Center building has been designed to satisfy the functional requirements of the Technical Support Center, the Emergency Control Center, the Communication Center and the Near Site Operations Center.

The design of the building enhances the proper control and coordinaton of the principle activities of emergency operations. The establishment, as soon as is reasonably possible after an accident, of the Emergency Control C<nter in this building will allow close coordination of all offsite emergency activities without interfering with plant emergency operations.

The building will be equipped to process personal dosimetry devices and will have facilities to analyze reactor coolant system and containment atmosphere samples after an accident.

Figure 2 is a conceptual floor plan of the Technical Support Center building illustrating the functional areas described above. Appendix A contains a functional description of each of the significant areas of the building.

" Building electrical service will be provided by underground primary service to a 3 phase, 4 wire 277/480 volt pad mounted transformer in the 300 to 500 KVA range, supplied from the Duquesne Light Company distribution system. A Diesel Emergency Generator (approximately 300 to 500 KVA) with a 1500 gallon steel underground fuel tank (48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> supply) will be installed to provide backup power for the full building requirement. UPS and battery systems will be incorporated into the design with a 480V delta, 120/208V wye dry type transformer provided to bypass the UPS equipment via a static switch.

Conctptu21 D: sign cf ths B:sycr Vallcy Pow 2r Station Technical Support Ccnter Page 5 II. Siting and Architectural Features (continued)

The building is designed to provide shielding from the potential maximum cloud dose expected during a postulated less of coolant accident in accordance with General Design Criteria 19. There is no expected dose component from shine from the Unit 1 containment expected because of the natural shielding provided by the highway embankment and intervening structures. The dosimetry facility will have additional shielding to permit continued use during accident conditions and the sample preparation and counting rooms will have additional shielding to prevent excessive exposure of building occupants in the event of a spill of radioactive materials in these areas.

III. Data and Acquisition System Data acquisition and display is planned to be accomplished through the use of a separate data acquisition computer. Input to this conputer will be obtained from isolated output of the reactor control racks, the reactor protection racks, the environmental monitor racks and other trans-ducero and switch contacts. Regulatory Guide 1.97, Revision 2, was used as a guide in determining the parameters to be acquired. The digital and analog information associated with these inputs will be multiplexed and transmitted to the Technical Support Center for display.

At the Technical Support Center, two consoles will be provided consisting of a CRT, printer and keyboard. The computer will also provide output to 10-2 pen strip chart recorders. These recorders will be capable of trending any variable available to the computer. -

Effluent radioactivity, area monitoring and meterlogical data will be acquired using a Nuclear Data Model 6650 dual computer system. Terminals served by this computer will be located in the plant control room, the tech-nical support center room and the emergency control center room.

IV. Radiological Instrumentation Sample preparation and counting facilities utilizing a Nuclear Data Model 4420 gamma spectrometry system with intrinsic germanium detector will be available in the building. We plan to provide a liquid scintil-lation system and gas internal proportional counters. A shielded glove box will be provided for handling potentially high activity reactor coolant system samples for counting. The room is well shielded for the protection for building occupants. It is also planned to maintain a reserve supply of various types of survey instruments and other radiological supplie-A dosimetry laboratory is also planned for the facility. This laboratory is designed with sufficient shielding so as to prov4.de a low background facility for the storage, evaluation and issuing ci personal dosimetry derices. This laboratory will also contain body scan equipment.

l- Conceptus 1 Dzeign of tha Basvar Valley Powar Station Technical Support-Center Page 6 i V. Summary The plans for the Technical Support Center building at Beaver Valley j Support Center building at Beaver Valley Power Station were developed to provide a coordinated, functional structure and equipment, well suited to

serve as the focal point of emergency control and responsive to the recommendations of the Lessons Learned Task Force.

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APPENDIX A Conceptual Description of Technical Support Center Building

1. Technical Support Center Room This room will be sized to accommodate approximately forty (40) persons. The room will contain approximately ten (10) wall mounted 2 pen recorders. Parameter display will be through two CRT consoles for hard copy print. There will be desk space for approximately twenty-five (25) persons and sufficient flat work space to hold 4 or 5 full size drawings. Space will be included for microfilm viewer or projector.

2. Computer Room This room will contain sufficient room for computer and process racks, programmer's desk and files, communications and tone equipment, also computer and recorder parts, supplies and a work table.

3. Emergency Control Center Room This room will contain site and area maps and will *.. re desk space for five (5) to ten (10) persons. This area will contain one CRT terminal and printer, teletype and a telecopier. This room will be located adjacent to the Technical Support Center Room.

4. Emergency Communications Center Room '

This room will contain working space for a minimum of five persons and should have two CRT terminals and will house the radio communication control equipment. .Each work position will have space for several tele-phones.

5. Emergency Director's Office This office will have direct access to and visual observation of the Technical Support Center Room and the Emergency Control Center Room.

This room sbculd be large enough to seat twelve (12) persons for briefings. ,

6. Near-Site Emergency Coordination This area will be sized to contain 10 two-man office cubicles for governmet.t liaison officials plus one office cubicle for the Duquesne Light Company liaison representative. This area will be fully equipped with telephone service, teletype and telecopies service. This room will be in reasonably close proximity to the Emergent; Director's Office, the Technical Support Center Room and the Emergency Control Center Room.

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Appsndix A- . .

Conceptual, Description of Technical Support Center Building 1

7. Auxiliary Facilities Rooms

a. Kitchen l

This room will contain a sink, two small microwaves, one 2-4 burner range and one freezer / refrigerator combination.

b. Records Room i

j This room will contain a set of as-built station drawings, a i

complete set of station manuals, the FSAR, a comprehensive set of vendors manuals and instruction books will also be available.

c. Sleepina Quarters 1

For 8-10 persons (fold-up cots acceptable).

d. Medical Facilities '

One bed, one first-aid cabinet and sink.

e. Garage for Monitoring Van

f. Reception Room and Security Room

g. Mechanical Equipment Room - HVAC, etc.

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