ML20207A793
Text
I
+# y neuq'o, UNITED STATES g,
NUCLEAR REGULATORY COMMISSION
{
C WASHINGTON D. C. 20555 o
% **"* /
GAR 171988 Docket Fo.: 50-293 MEMORANDUM FOR:
Richard H. Wessman, Project Director Project Directorate I-3 Division of Reactor Projects I/II, NRR FROM:
Conrad E. McCracken, Chief Chemical Engineering Branch Division of Engineering & Systems Technology, NRR
SUBJECT:
SAFETY EVALUATION REPORT OF CRITERIA FOR INSTALLATION OF INTERNA' CONDUIT SM0KE SEALS AT APPENDIX R BARRIERS AT PILGRIP.tVCLEAR POWER STATION (TAC NO. 49999) v752)
Plant: Pilgrim Nuclear Power Station Licensee:
Boston Edison Company TAC No.:
99999 Review Status: Complete The Chemical Engineering Branch Safety Evaluation Report of the licensee's response to staff concerns regarding passage of smoke through electrical conduits from one fire area to another is enclosed (Enclosure 1).
The staff was concerned that such passage of smoke could damage equipment and/or components of redundant safe shutdown trains in adjacent fire areas.
The licensee submitted their criteria for determining when installation of smoke seals is necessary in electrical conduits, and when necessary how they will be constructed and installed.
The staff agrees with the licensee that the criteria they have developed conforms to staff guidance and requirements and is adequate to give reasonable assurance that smoke generated by a fire in one fire area will not travel by way of electrical conduit to another fire area in sufficient quantities to damage redundant safe shutdown equipment and/or components.
Our SALP input is provided in Enclosure 2.
We consider our efforts on TAC No. 99999 are completed.
M1 Conra E. McCracken, Chief A
,9 7^. M " p 7 - K Chemical Engineering Branch i
Division of Engine (ring & Systems Technology nc osures:
1SER
/
.)]f,./."
SALP Report
[
/u'"
s cc:
L. Shao D. Mcdonald B. Boger D. Kubicki J. Richardson
Contact:
David Notley, x20847
___ _____