ML20205N682
| ML20205N682 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 10/28/1988 |
| From: | Calvo J Office of Nuclear Reactor Regulation |
| To: | Morris K OMAHA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 8811040282 | |
| Download: ML20205N682 (4) | |
Text
d L
/$,u. %f UNITES) STATES NUCLEAR REGULATORY COMMISSION e
f,
,I W ASHING TO N, D. C. 20C55
/
October 28, 1988
....+
Docket No. 50-285 Mr. X. J. Morris Division Manager - fluclear Operations Omaha Public Power District 1623 Harney Street Omaha, Nebraske 68102
Dear Mr. Morris:
SUBJECT:
TECHNICAL SPECIFICATION REQUIREMr.'HT FOR SAMPLING REACTOR C00LAlli DURit:G CORE OFF-LOAD C0hDITION In your letter dated October 28, 1988 (LIC-88-969) Omaha Public Power District (OPPD) requested a waiver from cor.pliance with the provisiuns of Fort Calhoun Station Technical Specification (TS) 3.2 relative to Table 3-4, Minimun Frequen-cies for Sampling Tests.
In particular, the waiver would allow the discontir.uance of sarpling the reactor coolant for boron and chloride concentrations during periods when the core is off-loaded and the reactor coolant system is drained.
The present TS fable states that (a) a sample for chloride concentration be taken every three days while in cold shutdown, and (b) samples for boron and chloride concentrations be taken every three days during ref ueling operations.
The I;RC staff has reviewed this request and has determined that a waiver is not required for the following reasons.
First, the water in the reactor coolant boundary is not providing a function at reactor coolant and rieutron rsoderator during periods when no fuel is present in the reactor vessel. Second, the basis for the boron concentration sarple is to ensure adequate shutdown e.argin for all core configurations during the refueling operation. The basis for the chloride sample is to ensure the prevention of chloride stress corrosion cracking.
In this case where no feel is present, the potential for this condition is 2
rcinimal since the reactor coolant temperature is low and a heat source is not plant in either the cold shutdan or refueling condition in that (a) place the present. Third, the condition when the core is off-loaded does not shutdown indicates a core reactivity condition with K less than 1.0, and (b) refueling indicatesthatoneormorefuelassemblies,8btrolrods,orneutronsourcesare present in the vessel and could be subject to movement. Thus, the TS requirements for both conditions were prepared in the case of coolant sampling on the basis that asserblies or sources were in the vessel. Finally, the action staterents fortheLimitingConditionsforOperation(LCO)fortheboronconcentration during refueling requires the cessation of fuel movement, which is inherently corplete if the fuel is off-loaded. The action statements for the chloride concentration require the placerent of the plant in a cold shutdown condition, which is also a mute issue when in either of the above conditions.
The NRC staff agre.e, with the conclusion of OPPD that the method for sampling the reactor coolant with the system in a drained down ;, tate poses an unnecessary increase in radiation exposure to the personnel atterpting to draw the serpla.
\\
es11040282 G81028
,, kt PDR ADOCK 050002g5 y
PDL s
p
2 In conclusion, the fiPC staff has interpreted TS 3.2 and Table 3-4 to not require the sarnpling for boron and chloride concentrations during the core off-loaded and reactor coolant system drained condition. Therefore, a waiver is not necessary.
However, the staff recomends that OPPD proceed with a request for atendment to clarify this situation prior to the 1990 refueling outage.
Sincerely,
\\ ff Jose A. Calvo, Director Project Directorate - IV Division of Reactor Projects - Ill, IV, V and Special Projects Office of Nuclear Reactor Regulation cc: See next page D!sTRIBUTI0fi UocWTITe' D. Crutchfield G. Holahan R. Martin, RIV NRC PDR L. Rubenstein J. Calvo L. Callan, RIV Local POR W. Hedges C. Cheng T. Westerman, RIV PD4 Reading P. Milano P. Noonan PD4/){
PD4/Pt!
PD4/D/ @
fl f
PJidonan PMilano:sr JCalvo LH dge CTCheng 10/.6/88 10/lb/88 10/ U/88 10
/S8 10/06/E8 GCCc6 (~ C McCraVen /Ol9lleB
F V In conclusion the NRC staff has interpreted TS 3.2 and Table 3-4 to not require' thesamplingforboronandchlorideconcentrationsduringthecoreoff-loaded and reactor coolant system drained condition. Therefore, a waiver is not necessary. However, the staff recomends that OPPD proceed with t request for amendment to clarify this situation prior to the 1990 refueling outage. Sincerely, u! h. [N S Jose A. Calvo, Director Project Directorate - IV Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation cc: Set next page l
s Mr. Kenneth J. Morris Fort Calhoun Station Omaha Publi. Power District Unit No. I cc: Harry H. Voigt, Esq. LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, NW Washington, D.C. 20036 Mr. Jack Jensen, Chairman Washington County Board of Supervisors Blair, Nebrash 55008 Mr. Phillip Harrell, Resident Inspector U.S. Nuclear Regulatory Comission P. O. Box 309 l Fort Calhoun, Nebraska 68023 i Mr. Charles B. Brinkman, flanager Washington Nuclear Operations C-E Power Systems 7910 Woodmont Avenue Bethesda, Maryland 20814 Regional Administrator, Region IV U.S. Nuclear Regulatory Comission Office of Executive Director for Operations 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 l Harold Borchert. Director Division of Radiological Health Departnent of Health 301 Centennial Mall, South l' P.O. Box 95007 Lincoln, Nebraska 68509 W. G. Gates, Manager Fort Calhoun Station P. O. Box 399 Fort Calhoun, Nebraska 68023 1}}