ML20237H641
| ML20237H641 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 05/19/1987 |
| From: | Strickland G, Terpstra G TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20237H133 | List:
|
| References | |
| FR-H.3, NUDOCS 8708170299 | |
| Download: ML20237H641 (6) | |
Text
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TENNESSEE VALLEY AUTHORITY
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SEQUOYAH NUCLEAR PLANT FUNCTION RESTORATION GUIDELINES FR-H.3 RESPONSE TO' STEAM GENERATOR HIGH LEVEL
.i Revision 1 PREPARED BY:
G. Strictland RESPONSIBLE SECTION: Operations REVISED BY:
Gm t. TespareA SUBMITTED BY:,
,1
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- s esponsible Section Supervisor PORC REVIEW DAT.
MAY 191987 APPROVED BY:_
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Plant Manager
'N I O IS N DATE APPROVED:
L Reason for revision (include all Instruction Change Form Nos.):
Revi;ed to make minor organization name change - step 4 changed HP to RAD CON.
i The last page of this instruction is number:
4
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PLANT INSTRUCTION REVISION LOG l
f FUNCTION RESTORATION GUIDELINES FR-H.3 ~
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REVISION Date Pages REASON FOR REVISION (INCLudC COMMIT-LEVEL Approved Affected MENTS AND ALL ICF FORM NUMBERS)
New instruction written per commitment 0
08/21/85 All to NUREG 0737
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lgj g jgg7 Revised to make minor organization name 3
3' change - step 4 changed PP to RAD CON.
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SQNP FR-H.3 Unit 1 or 2 Page 1 of 4 R ev, O f
Ik RESPONSE TO STEAM GENERATOR HIGH LEVEL
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A.
PURPOSE This guideline provides actions to respond to a steam generator high level B.
SYMPTOMS S/G level greater than 75%
C.
TRANSITION FROM OTHER INSTRUCTIONS 1.
FR-H.2, Response To Steam Generator Overpressure FR-H.4, Response To Loss of Normal Steam Release Capabilities 3.
Status Tree l(
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SQNP FH-H.3 Unit 1 or 2 Page 2 of 4 Rev. O f
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RESP 5NSE TO STEAM GENERATOR HIGH LEVEL S_TEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED g.-
1 Identify Affected S/G a.
Narrow range S/G '
a.
IF all S/G levels <. 75%,
level > 75%
THEN return to instruction in effect 2
Verify MFW Isolation a.
MFW isolation valves - CLOSED b.
MFW reg valves - CLOSED c.
MFW bypass valves - CLOSED d.
MFW Pumps - TRIPPED 3
Verify AFW Isolation To Affected S/G a.
Motor-driven AFW level control valve - CLOSED b.
Turbine-driven AFW level control valve - CLOSED c.
Affected S/G AFW flow 0 gpm c
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SQNP FR-H.3 Unit 1 or 2 Page 3 of 4 Rev. 1 RESPONSE TO STEAM GENERATOR HIGH LEVEL STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTkINED i
4 Check Affected S/G Radiation -
IF affected S/G radiation is f
NORMAL
- Eigh, i
THEN consult with TSC to a.
Condenser exhaust monitors evaluate the following bptions:
b.
S/G blowckown monitors Increase supports for the main steamlines Pin or block the pipe hangers I
Drain the main steamlines following Rad Con controls l
Establish S/G blowdown following Rad Con l
controls x
Go to
- E-3, STEAM GENERATOR TUBE RUPTURE l
IF condenser exhaust and 57G blowdown monitors NOT available, i
THEN:
{
Notify Rad Con l
to survey main j
steamlines and S/G blowdown lines l
Notify chem lab to sample a
S/G activity
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Check RM-90-124 Aux Bldg 690 Y
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RESPS/I aac
t SQNP FR-H. 3 Unit 1 or 2 Page 4 of 4 Rev. O RESP 5NSE TO STEAM GENERATOR HIGH LEVEL
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STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 5
Establish Blowdown From Affected S/G 6
Check Affected S/G Level a.
Narrow range S/G level -
DECREASING f
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l b.
I_F affected S/G level has
{
reached the main steamline
(> 90% S/G narrow range level),,
THEN:
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- 1) Do NOT depressurize affected S/G
- 2) Close affected S/G MSIV and bypass valve
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- 3) Close steam supply from affected S/G to turbine-driven AFW pump
- 4) Drain main steamline 7
Return To Instruction In Effect i
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