ML19269C763

Summary of Startup Testing for Cycle 2.

ML19269C763
Person / Time
Site:	Calvert Cliffs
Issue date:	02/05/1979
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML19269C762	List: ML19269C760 ML19269C763
References
NUDOCS 7902120158
Download: ML19269C763 (7)

Text

BALTIM0RE GAS AND ELECTRIC COMPANY CALVERT CLIFFS NUCLFAR POWER PLANT UNIT 2 Docket No. 50-318 License No. DPR-69

SUMMARY

OF STARTUP TESTING FOR SECOND CYCLE 790212 0\ %

SUMMARY

OF STARTUP TESTING FOR CALVERT CLIFFS UNIT T',!0 SECOND CYCLE I. The following tests were conducted for the Startup of Calvert Cliffs Unit Two for the Second Cycle. All tests were conducted in a manner similar to initial startup (Ref.1).

A. CEDM/CEA Performance Test B. RCS Flow Verification C. CEA Synmetry Check D. Initial Criticality E. Critical Boron Concentration Measurements F. Isothermal Temperature Coefficient Measurements G. Group Rod Worth Measurements H. Power Coefficient Measurements I. Power Distribution Measurements II. The results of these tests and comparison with predictions are as follows:

A. All trippable CEA's reached a 90% insertion in less than 3.0 seconds at hot, full flow conditions. Except for those CEA's currently residing in Small Flow Hole Design Guide Tubes, there were no significant differences from previous tests. Table 1 presents a comparison between CEA's which have resided in both the Standard (large flow hole) and Small Flow Hole Design Guide Tubes.

B. Reactor Coolant System flow was verified not to have undergone any significant changes since the first cycle.

Summary of Startup Testing Calvert Cliffs U2, 2/c Page 2 C. The CEA Symmetry Check verified that all CEA's were attached to their extension shafts.

D. Initial Criticality was achieved at 1153 ppm Boron with CEA Group Five at 68" withdrawn. Predicted value was 1180 ppm.

E. Critical Boron Measurements - Table 2.

F. Isothermal Temperature Coefficients - Table 3.

G. CEA Group Worth Measurements - Table 4.

H. Power Coefficient Measurements - Table 3.

I. Power Distribution Measurements - Table 5.

III. All test results were within acceptance limits.

REFERENCES

1. Calvert Cliffs Nuclear Power Plant Unit 2, Startup Test Report, May 12, 1977.

TABLE 1 CEA DROP TIME TO 90% INSERTION Hot (5320F) Full Flow Conditions CEDM No. Cycle 1* Cycle 2**

38 2.15 2.79 41 2.11 2.77 42 2.21 2.80 45 2.19 2.76 55 2.19 2.54 58 2.18 2.61 61 2.27 2.66 64 2.25 2.66

• Resides in Standard Design Guide Tube

• • Resides in Small Flow Hole Design Guide Tube

TABLE 2 CRITICAL BORON MEASUREMENTS Measured Predicted All Rods Out, 5320F 1185 ppm 1208 1 100 ppm CEA Group 5, 4, 3, 2, 1 956 ppm 986 1 100 ppm Fully Inserted TABLE 3 ISOTHERMAL TEMPERATURE COEFFICIENTS AND POWER COEFFICIENTS ITC Measured Predicted Zero Power, CEA Group 5 + .43 x 10-4ap/0F +.43 1 3 x 10-4ap/0F at 105" Withdrawn 50% Group 5 at 105" +.01 x 10-4ap/0F +.07 1 3 x 10-4ap/ 0F 100% Group 5 at 105" .50 x 10-4Ar/0F .24 i .3 x 10-4ap/ 0F POWER C0 EFFICIENT 50% Group 5 at 105" -1.12 x 10-46p/% .99 1 2 x 10-4ap/%

100% Group 5 at 105" .94 x 10-4ap/% .771 2 x 10-4ap/%

TABLE 4 CEA GROUP WORTH met % REMENTS Meas.: red (%Ap) Predicted (%Ap)

Group 5 .563 .585 1 088 Group 4 .372 .320 i .060 Group 3 .542 .541 1 081 Group 2 .455 .424 1 064 Group 1 .600 .654 1 090 TOTAL 2.532 2.524 1 252 TABLE 5 POWER DISTRIBUTION MEASUREMENTS

/

Measured Acceptance Limits 50% 100% 50% 100%

FxyT 1,64 1.58 1 1.74 1 1.61 F

r 1.51 1.48 1 1.644 1 1.54 Tq .006 .006 1 0.030 1 0.030