ML20009C717

Replacement Pages to Amend 28 to Plant Design Rept.

ML20009C717
Person / Time
Site:	Atlantic Nuclear Power Plant
Issue date:	07/15/1981
From:	OFFSHORE POWER SYSTEMS (SUBS. OF WESTINGHOUSE ELECTRI
To:
Shared Package
ML20009C711	List: ML20009C717
References
NUDOCS 8107210393
Download: ML20009C717 (3)

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REGULATION 10CFR50.34(e)(2)(xxv)

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Subject:

Post-Accident Support Facilities To satisfy the following requirements, the application shall provide sufficient infonnation to demonstrate that the required actions will be satisfactorily completed by the operating license stage. This information is of the type customarily required to satisfy 10CFR50.35(a)(2) or to address unresolved generic safety issues.

Provide a Technical Support Center, an onsite Operational Support Center, and an Einergency Operations Facility. (III.A.1.2) 0FFSHORE POWER SYSTEMS RESPONSE Emergency Response Facilities will be designed in accordance with guidance provided in NUREG-0696. The technical support center (TSC) is an onsite facility located close to the control room that provides plar t management and technical support to the reactor operating personnel located in the control room during emergency conditions. It has technical data displays and plant records available to assist in the detailed analysis and diagnosis of abnormal pl ant conditions and any siignificant release of O radioactivity to the environment. The TSC will be the primary comunica-tions' center for the pl ant during an emergency. A senior official, designated by the licensee, can use the resources of the TSC to assist the control room operators by handling the administrative items, technical evaluationss, and contact with offsite activities, relieving them of these functions. The TSC facilities may also be used for performing normal functiors, such as snift technical supervisor and plant operations /

maintenance analysis functions, as well as for emergencies.

The Onsite Technical Support Center (TSC) for the FNP is located on the mezzanine of the Emergency Relocation Area (ERA) as shown in Figures C-10 through C-12. This center is provided with the same degree of shielding, environmental control, missile protectico and security as the Control Room.

This center uses a ventilation system equal to the Control Roon system.

Necessary communication between the TSC and both the Control Room and Onsite Operational Support Center will be provided. Offsite cocynunications will be provided by the owner. As outlined below, plant status can be

/) readily ob6ained in the TSC during normal as well as emergency operation.

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Amendment 28 8107210393 810720 C-102 July 15,1981 PDR ADOCK 05000437 A PDR ,

Necessary "as-built" documentation will be filed in the TSC or elsewhere within the shielded control building.

Offshore Power Systems will provide CRT terminals for the SPDS and to access data from the plant computer system. The specific instrumentation required in the TSC will be determined during final detailed design of the FNP. The major portion of the Emergency Response data acquisition system will be provided by the SPDS data system. This system will display the full range of important 'arameters and data trends on demand and is more fully described in response to 10CFR50.34(e)(2)(iv). Other parameters needed to complete the emergency response data will be prmded by the plant computer system. The data acquisition from the plant computer will be secured by either hardware or software to prevent unauthorized access during nomal operation. The plant computer hus dual CPUs and will meet the availability requirements of NUREG-0696. j OPS believes that the FNP concept provides unique advantages regarding as-built documentation, including the following:

a. greater level of detail on drawings (dimensioning, part numbers, etc.)

because of the manufacturing concept.

b. greater consistency and coordination among as-built documents, since j

OPS is ultimately responsible for all as-built documentation for the FNP.

c. FNP units and their documentation would be virtually identical, allowing use of other units for full-scale studies regarding recovery operations.

The Operational Support Center (OSC) is an onsite area separate from the Control Room and the TSC where the owner's personnel will assemble in an emergency. The OSC provides a location where plant logistic support can be coordinated during an emergency and will provide the capability for the owner to restrict Control Room access to those support personnel speciff-cally requested by the shift supervisor. The owner's emergency procedures Amendment 28 C-103 July 15,1981

will require that the OSC, when activated, be supervised by the owner's operations personnel designated in the owner's emergency plan to perform d these functions. The Emergency Relocation Area (at Elev. 100' in the control building) beneath the Control Room will be the Onsite Operational Support Center as thown in Figures C-10, C-11 and C-13. This area is designed to the same criteria for shielding, missile protection and environmental controls as the Control Room. Emergency storage facilities and comunications equipment for onsite operational support are provided.

i The Emergency Relocation Area is safely accessible from the Control Room via a stairway which is enclosed within the shielaed control building.

The Near-Site Emergency Operations Facility (E0F) will be provided by the plant owner. Provisions will be made for the transfer of infonnation from the TSC to the Owner's communications system interfacing with the EOF.

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(G Amendment 28 C-104 Jely 15, 1981

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