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Forwards LER#78-091/03L-0;#78-092/03L-0/;#78-093/03L-0; #78-094/03L-0;#78-095/03L-0;#78-096/03L-0;#78-097/03L-0; & #78-098/03L-0.

Accession Number: ML17317A823

Date Released: Thursday, May 31, 2018

Package Contents

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• ML17317A822 - Forwards LER#78-091/03L-0;#78-092/03L-0/;#78-093/03L-0; #78-094/03L-0;#78-095/03L-0;#78-096/03L-0;#78-097/03L-0; & #78-098/03L-0. (2 page(s), 12/20/1978)
• ML17317A824 - LER#78-091/03L-0 on 781125:source range neutron flux channel N-31 inoperable.Caused by unclean connectors on high voltage cable & signal cable at prcamp. (2 page(s), 12/20/1978)
• ML17317A825 - LER#78-092/03L-0 on 781125:reactor coolant average temp on 2 of 4 loops below Tech Specs of 541F,resulting in P-12 permissive being actuated.Caused by turbine test w/minimum steam dump,increase steam flow caused temp drop. (2 page(s), 12/20/1978)
• ML17317A826 - LER#78-093/03L-0 on 781125:rod position indication(RPI)for control rod H-8 exceeded 12 step limit.Caused by H-8 drift. (2 page(s), 12/20/1978)
• ML17317A827 - LER#78-094/03L-0 on 781202:halon sys for cable spreading area was discharged & therefore inoperable.Caused by operator error. (2 page(s), 12/20/1978)
• ML17317A828 - LER#78-095/03L-0 on 781206:while decreasing turbine load, reactor coolant average temp exceeded 576.2 F.Caused by faulty drain valves on 5-A heater,creating unstable feedwater control & turbine load. (2 page(s), 12/20/1978)
• ML17317A829 - LER#78-096/03L-0 on 781209:during rapid load reduction from 100% to 88%,axial flux difference went outside target band. Air leak on "A" condenser vacuum breaker caused increase in back pressure on main condenser. (2 page(s), 12/20/1978)
• ML17317A830 - LER#78-097/03L-0 on 781209:during rapid pwr reduction from 100% to 88%,pwr pressurizer pressure reduced below tech spec limit of 2220psia.Caused by rapid pwr reduction because of decreasing vacuum on main turbine/generator. (2 page(s), 12/20/1978)
• ML17317A831 - LER#78-098/03L-0 on 781010:axial flux difference(AFD) monitoring alarm point was discovered to be set at 103% vice 84%.Caused by AFD alarm trip point being raised for testing purposes & not returned to correct point. (4 page(s), 12/20/1978)