ML19259C071
| ML19259C071 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 05/22/1979 |
| From: | Wilson B SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Doug Garner Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7906120320 | |
| Download: ML19259C071 (2) | |
Text
ro:
Mr. Dan Carner, USNRC Fors:
Mr. Da uce Wilson 2-i Secr mento Municipal Utgtg gef friAluIrm QUIZ F rena:
l.
priefly discusa the six potential human, design and mechanical failua ca which resulted in coro dassage and radiation rolease at the 1:II-2 nuclcar plant.
2.
Recontly the power oporated relief valves and the hi pressure enaetor trte met points were changed.
a.
What are the new applicable sotpoints?
b.
14tiofly discuss the bases for the above changes.
3.
Operating proceduros cautions operators not to defeat any portion of the SPAS and ovorrido the automatic actions unless continued ~
operation would throaten reactor vessel integrity.
a.
List the instruscontation that are available to help the c4wrator assos vennel integrity.
b.
What plant equi cont is designed to prevent the RCS frco l
exe.teding tho 2750 paig limit?
c.
Itow can the operator be assured that the 2750 psig criteria has not been owcoeded?
4.
Operating proca. lure D.14 requiros manually tripping the reactor on lows of foedwatur or low staan generator level.
a.
List thu instrumontation or alarns that are available to help the operator assoasboth of the above conditions.
b.
Discuss briefly the criteria when tite operator must trip the reactor on Ic.w steam generator level.
S.
Hecant dusign changes to the Rancho Seco Nuclear Plant includes anticipatory reactor trip circuitry.
a.
hhat are the anticipatory Roactor trip circuits added?
b.
uhora do thomo new anticipatory trips receive their actuating minnals?
c.
How are those trips "placed into" and " removed from" during ut.artup ar.d shutdown situations?
d.
l.h o t. are the logging requireraents when tho above trips are 0% 0 "placed into" or " removed from" service?
4s E
790612037_o THIS DOCUMENT CONTAINS POOR QUALITY PAGES
Page 2..of 2 f2. 4mrating proceduro B.4 provides a procedure for placing natural circulatica into servica.
Driufly discuss hcu the of. orator can ensure that natural
~
circulat. ion la occuring.
3 s
12.
briefly discus:s cpucator ~ action if the plant is in natural circ.ulation and the Af W pumps boccr.o inoperable.
c.
Ilow can the operator verify that the plant is subcooled and remains subcooled.
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