Control Room Log

Recovery Length of time to recover Maintenance reports, control-room log... 

Appendix III of this report provides a detailed description of the reliability data used in event tree and fault tree quantification. Because of its extensive operating experience and the uniqueness of the BRP design, BRP plant-specific data was used whenever possible. Plant-specific data sources included plant maintenance orders, control room log books, surveillance tests, LERs, event reports, deviation reports, plant review committee meeting minutes, and USNRC correspondence. The plant-specific data used spanned the period from 1970 to 1979. Data before 1970 did not include maintenance orders or surveillance tests and therefore were excluded. The plant-specific data collected for BRP is presented in detail in Appendix XIII. Table III-4 summarizes 30 plant-specific component failure rates and Table 11-06 contains plant-specific maintenance unavailabilities for 20 components. These tables are a summary of the BRP component failure and maintenance outages. 

Licensee Event Reports (LERs) Operator/Control Room Logs Diesel Generator Start Logs Maintenance Work Orders Post-Trip Analysis Reports NRC Gray Book Interview with Plant Personnel Other Plant Logs and Records... 

Control room logs shall be reviewed and initialed by the Shift Manager, and logs kept by operators outside of the control room shall be reviewed by the Control Room Supervisor in charge of the reactor or an appropriate supervisor. These reviews normally would occur shortly before shift relief and shall ensure that entries are accurate and adequate. Additionally, the contractor s Operations Manager shall review the control room logs on a daily basis when in the area. 

The catalyst preparation area supervisor, on-duty control room operator for the catalyst operation, and maintenance superintendent were key sources of information. Their written records and logs were examined in detail. Other personnel that were interviewed included two outside operators, fire brigade members, and associated maintenance employees. During these conversations, special attention was paid to nonverbal signals. The interview process generated several unanswered questions about operational and maintenance procedures that required further study. 

Building and room access considerations Key control considerations Fire protection considerations Environmental eontrol considerations Building and room access considerations Operations/control room access controls Maintaining an entry/exit log for the above... 

During its in-depth review, the committee observed differences in the types and completeness of entries made in JACADS and TOCDF operating logs (deactivation furnace system, demilitarization protective ensemble, control room. 

Automatic data logging is an addition to control rooms which aids process control (Fig. 9-226). Electronic equipment is provided which continually scans all process variables, typing on a log sheet the variables which are off their preset limits, so that operators can make adjustments when necessary. 1 Other options include typing of a complete log of variables periodically and teletyping production rates and other information to remote points, such as the sales office. 

Attempt to split the sheets into control room and outside data. Usually, such a split will coincide with the log sheet used by the shift personnel. Aim to include a many sets of data as possible on each sheet to reduce the volume of paper. A computer-t3rped log sheet is easiest to edit. When using a personal computer, use a high-quality printer for the final version. An attractive flow sheet enhances cooperation from those taking readings. 

Vitrification Cells. Liquor is fed from the HAL cell to one of the two duplicate vitrification cells in the WVP. These house the main chemical process equipment, namely the calciner, melter, and primary off-gas vessels. The Vitrification Cell equipment evaporates the HAL liquor to dryness, mixes it with pre-formed glass (inactive) and other additives, and melts the mixture to form the glass product at a temperature of around 1100 C. The primary off-gas system removes dust, water vapor, and a proportion of the radioactive species that are entrained in the off-gas stream. HAL liquor is fed continuously into the Vitrification Cell and the glass product is poured in batches, approximately every 8 hours. Process conditions within the cells are generally manually controlled. All vitrification instrumentation is logged to a central control room an interlock system is provided to trip the vitrification process if pre-set conditions are exceeded. 

The maintenance crew had partially disassembled the leg and managed to extract a polyethylene log from one section of the leg. However, part of the log remained lodged in the pipe below the 8 in. isolation valve. Witnesses stated that a mechanic went to the control room to request help from an operator. A short time later, vapor was seen escaping from the disassembled settling leg [15]. 

The operating shift must be aware of how equipment and systems will fimetion for operational purposes. Reference 6-24 states that the Shift h nagers and the Components Handling Senior Superior are responsible for status control of systems. The Control Room Supnvisors shall mountain the system s status notebook in the control room. Control Room Supervisors also are required to log changes in stem status in the system status notd)ook. Reference 6-24 addresses the actions necessary to restore equipment to service after maintenance activities. 

The control room should keep a log of who is outside by themselves. 

CCR An abbreviation for central control room where process plant information is transmitted, logged, and controlled. The CCR is located in a safe part of the plant and is often protected against fire and explosion. 

In order that control room personnel be able to adequately determine the effect of the tagout on the facility, a lockout log and lockout order book are required to be maintained to provide a record of all active tagouts and the position of all tagged components. 

ROSI IV.14 states that, for systems under the control of the Shift Manager, the control room supervisor shall maintain the system s status notebook in the control room. This notebook will be used to formally document changes to the system configuration. ROSI IV.11, "Control of Work" (Reference 3), also requires the control room supervisor to log changes in system status in the system status notebook. The control room supervisor is required to authorize all changes in status of the systems directly affecting reactor operations and the fire detection/suppression systems. These systems are listed in Attachment I to the ROSI. 

ROSI IV.9 requires that each failure to meet an LCO be recorded on an LCO Status Sheet. All active status sheets are required to be placed in an LCO Status Binder, which is maintained in the control room by the control room supervisor. In addition to signing each LCO Status Sheet, the Shift Manager is required to document each failure to meet an LCO in the Shift Manager s log and inform Operations management. ROSI IV.9 also describes the actions to be taken to update the LCO Status Sheets when compensatory actions are taken or completed, restoration to normal status occurs, and for final disposition. 

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