05000280/LER-2077-009, Test of Main Steam Safety Valve Setpoint

Test of Main Steam Safety Valve Setpoint

ML19105A111
Person / Time
Site:	Surry
Issue date:	10/11/1977
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	O'Reilly J NRC/IE, NRC/RGN-II
References
LER 1977-009-00
Download: ML19105A111 (4)

LER-2077-009, Test of Main Steam Safety Valve Setpoint

Event date:
Report date:
2802077009R00 - NRC Website

text

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. Docket *. No.* -: ?0_:281

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8 9 14 15 25 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER LICENSE TYPE l411!1l1lol 26 30 EVENT DATE EVENT TYPE lo 13 I 31 32 REPORT DATE

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LI _t_h_e_v_a_l v_e_s_(_sv_-_M_s_-_2_0_1_A~, _2_0_1_B_,:...._2_0_1_c_:,:...._2_0_2_B..:,_2_0_2_c..:..)_t_h_i_s_e_v_e_n_t_i_s_r_ep=-o-r_ta_b_l_e___,p,_e_r ____ -=!1 7

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7 8 9 PRIME 80 SYSTEM CODE

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8 9 10

CAUSE

CODE l!J 11 CAUSE DESCRIPTION COMPONENT CODE IV I A I LI VIE IX I 12 17 COMPONENT SUPPLIER

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43 COMPONENT MANUFACTURER I CI 5 j 6 j 71 44 47 VIOLATION LIJ 48 jolal j Five (5) Consolidated safety relief valves were found to be outside of the 3% as 7

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j found tolerance in their pop point.

The cause is attributable to normal setpoint 7

8 9 E@ I drift.

The valves were adjusted and retested satisfactorily.

7 8 9 FACILITY STATUS

% POWER OTHER STATUS EEl

~ I O I O I 01 NA 7

8 9

10 12 13 FORM OF ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY rn uJ WI NA 7

8 9

10 11 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

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NA 7

8 9 11 12 13 PERS'ONNEL INJURIES NUMBER

DESCRIPTION

44 METHOD OF DISCOVERY

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45 44 45 DISCOVERY DESCRIPTION I

NA 46 LOCATION OF RELEASE NA I

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80 I

80 80 80 60 EE] *10 I O I 01 L___ ___

NA ______________________

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7 8 9 11 12 80 OFFSITE CONSEQUENCES

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NA 7

8 9 80 LOSS OR DAMAGE TO FACILITY TYPE

DESCRIPTION

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7 8 9 10 80 PUBLICITY

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80 7

8 9 ADDITIONAL FACTORS EJfil I The combined capacity of the safety valves is designed to exceed the total steam 7

B 9 80 [iliJ flow corr.esponding to the maximum steady state power that can be obtained during one, 7

89 80 NAME: ___

T_._L_._B_au_c_o_m _______________ PHONE:

(804) 357-3184 GPO BB1

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• • , ii, ADDITIONAL FACTORS (CONTINUED) two, or three loop operation, Full relief capacity would have been achieved at 1145 PSIG, 1133 PSIG, and 114Q PSIG for loops A; B, and C respectively,

• contrary to the design*.vglu.? of 1135 PSIG.

This capability would have pre-vented any overpressurization of the steam generators.

Hence, this drift of setpoint did not endanger the health and safety of the general public.

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