ML14190A778
| ML14190A778 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 05/07/1984 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Utley E CAROLINA POWER & LIGHT CO. |
| References | |
| TAC-42466, NUDOCS 8405210363 | |
| Download: ML14190A778 (3) | |
Text
Docket No. 50-261 May 7,,1984 DISTRIBUTION rocr MMTDT" JNGrace NRC PDR OELD L PDR Mr. E. E. Utley, Executive Vice President ORB#1 Rdg Power Supply and Engineering & Construction Gray File Carolina Power and Light Company CParrish Post Office Box 1551 GRequa Raleigh, North Carolina 27602 DEisenhut ACRS 10
Dear Mr. Utley:
EJordan
SUBJECT:
ENVIRONMENTAL QUALIFICATION OF EQUIPMENT IMPORTANT TO SAFETY, REQUEST FOR ADDITIONAL INFORMATION H. B. ROBINSON 2 TAC NO. 42466 We have completed our review of the environmental qualification of electrical equipment important to safety for H. B. Robinson. The review produced the need to docket the remaining outstanding justifications for continued operation (JCO's) and the additional.listed information. In order to complete the Safety Evaluation Report on environmental qualification for H. B. Robinson 2 following information is required by May 31, 1984:
- 1. Submit all applicable JOC's that are currently being relied upon and certify the following for each JCO associated with equipment that is assumed to fail:
No significant degradation of any safety function or misleading information to the operation as a result of failure of equipment under the accident environment resulting from a design basis event will occur.
- 2. The licensee should certify that in performing its review of the methodology to identify equipment within the scope of 10 CFR 50.49(b)(2) that the following steps have been addressed:
- 1. A list was generated of safety-related electric equipment as defined in paragraph (b)(1) of 10 CFR 50.49 required to remain functional during or following design-basis Loss of Coolant Accident (LOCA) or High Energy Line Break (HELB) Accidents. The LOCA/HELB accidents are the only design-basis accidents which result in significantly adverse envirionmentas to electric equipment which is required for safe shutdown or accident mitigation. The list was based on reviews of the Final Safety Analysis Report (FASR), Technical Specifications, Emergency Operating Procedures, Piping and Instrumentation Diagrams (P&IDs), and electrical distribution diagrams; 8405210363 840507 PDR ADOCK 05000261 P
2 May 7, 1984
- 2. The elementary wiring diagrams of the safety-related electrical equipment identified in Step 1 were reviewed to identify any auxiliary devices electrically connected directly into the control'or power circuitry of the safety-related equipment (e.g.,
automatic trips) whose failure due to postulated environmental conditions could.prevent required operation of the safety-related equipment and;
- 3. The operation of the safety-related systems and equipment were reviewed to identify any directly mechanically connected auxiliary systems with electrical components which are necessary for the required operation of the safety-related equipment (e.g.,
cooling water or lubricating systems). This involved the review of P&IDs, component technical manuals, and/or systems descriptions in the FSAR.
- 4. Nonsafety-related electrical circuits indirectly associated with the electrical equipment identified in Step 1 by common power supply or physical proximity were considered by a review of the electrical design including the use of applicable industry standards (e.g., IEEE, NEMA, ANSI, UL, and NEC) and the use of properly coordinated protective relays, circuit breakers,-and fuses for electrical fault protection.
- 3. Provide certification that all design basis events which could potentially result in a.harsh environment, including flooding outside containment, were addressed in identifying safety-related electrical equipment within the scope of 10 CFR 50.49(b)(1).
These items have already been telecopied to your staff. A telephone conference was held with your staff on May 4, 1984 to reach a mutual understanding regarding information required in addition to that information already supplied by your submittal dated May 3, 1984.
Sincerely, Steven A. Varga, Chief Operating Reactors Branch #1 Division of Licensing
Enclosure:
As stated cc w/enc re:
See ne gT ORB#1*
- 1:DL GReq a;ps
- a.
5/1/84.
/
/84
Mr. E. E. Utley H. B. Robinson Steam Electric Carolina Power and Light Company Plant 2 cc:
G. F. Trowbridge, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.
Washington, DC 20036 Regional Radiation Representative EPA Regiona IV 345 Courtland Street, N.E.
Atlanta, GA 30308 Mr. McCuen Morrell, Chairman Darlington County Board of Supervisors County Courthouse Darlington, South Carolina 29535 State Clearinghouse Division of Policy Development 116 West Jones Street Raleigh, North Carolina 27603 Attorney General Department of Justice Justice Building Raleigh, North Carolina 27602 U.S. Nuclear Regulatory Commission Resident Inspector's Office H. B. Robinson Steam Electric Plant Route 5, Box 413 Hartsville, South Carolina 29550 James P. O'Reilly Regional Administrator -
Region II U.S. Nuclear Regulatory Commission 101 Marietta Street Atlanta, GA 30303 Mr. R. Morgan General Manager H. B. Robinson Steam Electric Plant Post OfficeBox 790 Hartsville, South Carolina 29550