ML20207P590

Proposed Tech Specs Re Toxic Gas Monitor Operating Limits & Min Frequencies for Checks,Calibrs & Testing of Miscellaneous Instrumentation & Controls

ML20207P590
Person / Time
Site:	Fort Calhoun
Issue date:	01/08/1987
From:	OMAHA PUBLIC POWER DISTRICT
To:
Shared Package
ML20207P572	List: ML20207P571 ML20207P581 ML20207P590
References
TAC-64446, NUDOCS 8701160279
Download: ML20207P590 (4)

Text

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TABLE 2-11

.T0XIC GAS MONITORS OPEPATING LIMITS ,

I Minimum Instrument Operable Channels Action {

g

1. Chlorine Detectors

• 2 (,a) (b)  !

2.

Sulfuric Acid Detectors

• 2 (a)(b) i I

3. Hydrazine* Ammonia Detectors 2 (a)(b) l (a) With one toxic detector inoperable, restore the inoperable detector to OPERABLE status within 7 days, or within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> initiate,and maintain operation of the control room ventilation system in the .

recirculation mode of operation.  ;

i (b) With both toxic detectors inoperable, within I hour initiate and main- i tain operation of the control room ventilation system in the recircula- '

tion mode of operation. I i

u furic n draz ne.

j O- 2-100 Amendment tb. 87 8701160279 870108 PDR ADOCK 05000285 P PDR e ,

i O O 4 .

TABLE 3-3 (Continued)

MINIMUM FREQUENCIES FOR CllECKS, CALIBRATIONS N1D TESTING OF filSCELLAllE005 INSTRUMENTAT10!i ArlD C0flTROLS Surveillance Channel Description Function Frequency Surveillance Method

- 25. Containment Purge Isolation Check H Verify valve position using control '

Valves (PCV-742A, B. C. & D) room indication.

26. Containment Hydrogen a. Check Il a. Comparison of readings from redun-Ibnitors (VA-81A&B) dant channels,

b. Test Q b. Calibrate span /zero using sample gas and check flow rates.

l l m c. Calibrate R c. Calibrate using known signals applied to sensors.

E l 27. Containment Water Level a. Check M a. Compare independent level readings.

Narrow Range (LT-599 &

LT-600) b. Calibrate g R b. Known signals applied to sensors.

Wide Range (LT-387 & a. Check 11 a. Observe nnrmal reading and simulate

p LT-388 full scale reading.

E g- b Calibrate R b. Known signals applied to sensors.

S

• 28. Containment Wide Range a. Check H a. Compare independent pressure readings.

g Pressure Indication

b. Calibrate R b. Apply known pressure to sensors.

E l

29. Toxic Gas Detectors: '

g a. Check S a. Comparison of readings from redun-

- YIT-6288A&B YIT-6286A&B (IICI(Clp) HF,

~

dant channels.

= it.3504 )

Calibrate span /zero using calibration l g-

~

b. Calibrate 11 b.

! ~ card. ,

I i c. Calibrate R c. Calibrate span /zero adjustment with a calibration card, and verify using nas e: t andards .

. . . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . . _ _ _ _ _ _ _ . . - _ _ _ _ _ _ _ _ _ _ _ _ _.__ms_ _ _ . _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ . . _ _ _ _ . . _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ . _ . _ _ _ _ _ . _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ . . . _ _ _ . - _ _ - _ _ . _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ - _

p .- y -

m ;; . .-

k

~ TABLE 3-3 (Continued)

Mitill1UM FREQUE!!CIES FOR CilECKS, CALIBRATI0t45 Af4D TESTIf4G OF MISCELLAtlE00S If4STRt1EllTATI0ft A!10 00f4TROLS Surveillance Channel Description function frequency Surveillance Method _ -

YII-6287A&B (fi2 "4' E 3) a. Check S a. Comparison of readings from redun-

. dant channels.

.3

b. Calibrate Q b. Gas calibration.

w L

E Q - Quarterly S - Each Shift D - Daily H - 11onthly A - Annually

> R - 18 months l P - Prior to each startup if not performed within previous week.

g PM - Prior to scheduled cold leg cooldown below 300oF; monthly whenever temperature remains below 3000F cnd g reactor vessel head is installed.

e .

2 ,

.s o ATTACHMENT B Justification, Discussion No Significant Hazards Considerations On September 3,1982, the Omaha Public Power District (OPPD) received materials License SMC-1420 which authorized possession of natural uranium hexafloride (UF6 ) at Fort Calhoun Station. It was later determined that while OPPD will need this material in the future, OPPD did not and will not require this material onsite, and in April of 1986, OPPD shipped the material offsite to Martin-Marrietta Energy Systems - DOE Production Facility in Paducah, Kentucky. With the materials offsite, the license is no longer required. This license is presently due to expire on August 31, 1987.

No Sianificant Hazards Considerations OPPD has evaluated the proposed change to determination if significant hazards exist. As such, the following if presented;

1. Would the change involve a significant increase in the possibility or consequences of an accident previously evaluated?

No. Since UF6 will no longer be stored onsite, there will be no possibility of a toxic gas accident involving Hydrogen Floride.

2. Would the change create the possibility of a new or different type of accident from any previously evaluated?

No. This change, being a removal, will have no effect on the possibility for an accident or malfunction of a different type than any evaluated previously by the SAR.

3. Would the change involve a significant reduction in a margin of safety?

No. Since this is a removal of Hydrogen Floride, there will be no possibility of a toxic gas accident involving UF ,6 and the associated detection requirements are no longer required.

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