View source for Information Notice 1992-67, Deficiency in Design Modifications to Address Failures of Hiller Actuators Upon a Gradual Loss of Air Pressure

{{Adams
| number = ML031210653
| issue date = 09/10/1992
| title = Deficiency in Design Modifications to Address Failures of Hiller Actuators Upon a Gradual Loss of Air Pressure
| author name = Rossi C
| author affiliation = NRC/NRR
| addressee name = 
| addressee affiliation = 
| docket = 05000003, 05000010, 05000029, 05000133, 05000155, 05000171, 05000206, 05000213, 05000219, 05000220, 05000237, 05000244, 05000245, 05000247, 05000249, 05000250, 05000251, 05000254, 05000255, 05000259, 05000260, 05000261, 05000263, 05000265, 05000266, 05000267, 05000269, 05000270, 05000271, 05000272, 05000275, 05000277, 05000278, 05000280, 05000281, 05000282, 05000285, 05000286, 05000287, 05000289, 05000293, 05000295, 05000296, 05000298, 05000301, 05000302, 05000304, 05000305, 05000306, 05000309, 05000311, 05000312, 05000313, 05000315, 05000316, 05000317, 05000318, 05000320, 05000321, 05000322, 05000323, 05000324, 05000325, 05000327, 05000328, 05000329, 05000330, 05000331, 05000333, 05000334, 05000335, 05000336, 05000338, 05000339, 05000341, 05000344, 05000346, 05000348, 05000352, 05000353, 05000354, 05000361, 05000362, 05000364, 05000366, 05000368, 05000369, 05000370, 05000373, 05000374, 05000382, 05000387, 05000388, 05000389, 05000390, 05000391, 05000395, 05000397, 05000400, 05000409, 05000410, 05000412, 05000413, 05000414, 05000416, 05000423, 05000424, 05000425, 05000437, 05000438, 05000439, 05000440, 05000441, 05000443, 05000444, 05000445, 05000446, 05000454, 05000455, 05000456, 05000457, 05000458, 05000461, 05000482, 05000483, 05000498, 05000499, 05000508, 05000528, 05000529, 05000530
| license number = 
| contact person = 
| document report number = IN-92-067, NUDOCS 9209030017
| document type = NRC Information Notice
| page count = 8
}}
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UNITED STATES

NUCLEAR REGULATORY COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555 September 10, 1992 NRC INFORMATION NOTICE 92-67:     DEFICIENCY IN DESIGN MODIFICATIONS TO ADDRESS

FAILURES OF HILLER ACTUATORS UPON A GRADUAL

LOSS OF AIR PRESSURE

==Addressees==
for nuclear power

All holders of operating licenses or construction permits

reactors.

==Purpose==
issuing this information

The U.S. Nuclear Regulatory Commission (NRC) is                  problem pertaining to

notice to alert addressees to a potentially significantvalve   actuators   upon a

modifications made to address failures of Hiller         Information    Notice (IN)
   gradual loss of air pressure, as discussed in NRC Loss of Air Pressure." It

82-25, "Failures of Hiller Actuators upon Gradual               for applicability to

is expected that recipients will review the information to avoid similar

their facilities and consider actions, as appropriate,   information notice are not

problems. However, suggestions contained in thisor written response is

NRC requirements; therefore, no specific action

required.

==Description of Circumstances==
preheater bypass

Valve assemblies for three Shearon Harris main feedwater for Q Class

isolation valves were specified, procured,    and   installed

the valves and the

application. The Anchor Darling Valve Company supplied

associated Hiller actuators.

discovered several

On January 7, 1992, Carolina Power and Light Company                of the three main

to  the   actuators

components associated with the air supply                   qualified for a Q Class

feedwater preheater bypass isolation valves were notpump in the non-Q Class, application. Specifically, the failure of the air               accumulator could

non-seismic instrument air supply to the valve actuator   from  detecting slow leakage

prevent pressure switches upstream of    the air   pump

lines. The pressure

in the Q Class, seismic portion of the actuator air sending an automatic close

switches were installed to ensure valve   closure    by

of the actuator air

signal if the instrument air system pressure (upstream

pump) dropped to 66 psig as discussed in IN 82-25.

function as containment

The main feedwater preheater bypass isolation valves          signal. The function

isolation valves upon receipt of a   feedwater   isolation

air supply pressure from

of the air pump is to raise the normal instrument                 pressure drops from

70 toJlO-.ps4s to approximately 150 psig. If accumulator

I

_r003017/X

J

IN 92-67 September 10, 1992 150 psig to 122 psig, the main feedwater

not close within 10 seconds. If pressure preheater bypass isolation valve may

it may not be sufficient to close the main drops to a value as low as 20 psig, isolation valve and keep it closed against feedwater preheater bypass

across the valve seat.                        the maximum differential pressure

Upon discovery of this condition, Shearon

interval for verifying that the actuators' Harris established a surveillance

properly and that the accumulators were fully components were functioning

1992, non-Q components were replaced with         pressurized. On January 12, completed satisfactorily.                    suitable  components and testing was

On January 15, 1992, the Shearon Harris

deficiency in the Hiller actuator for theSafety Committee determined that the

isolation valves was reportable under 10 main feedwater preheater bypass

of the possibility that these valves mightCFR Part 21 (Attachment 1), because

related function to close within 10 seconds not be able to meet their safety- for containment isolation.                      of a feedwater isolation signal

Other air-operated valves may be susceptible

to similar failure mechanisms.

This information notice requires no specific

you have any questions about the information action or written response. If

the technical contact listed below or the        in this notice, please contact

Reactor Regulation (NRR) project manager.    appropriate   Office of Nuclear

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical contact:    Patricia Campbell, NRR

(301) 504-1311 Attachments:
1. Carolina Power and Light Company

Shearon Harris Nuclear Power Plant Part

2. List of Recently Issued NRC Information        21 Notices

'-I

Attachment 2 IN 92-67 September 10, 1992 LIST OF RECENTLY ISSUED

NRC INFORMATION NOTICES

Information                                    Date of

Notice No.             Subject                 Issuance        Issued to

92-66          Access Denied to NRC            09/01/92        All holders of OLs or CPs

Inspectors at Five Star                        for nuclear power reactors

Products, Inc. and                             and all reci pients of

Construction Products                           NUREG-0040, "Licensee, Con- Research, Fairfield,                            tractor and Vendor Inspec- Connecticut                                     tion Status Report" (White

Book).

92-65          Safety System Problems         09/03/92        All holders of OLs or CPs

Caused by Modifications                         for nuclear power reactors.

That Were Not Adequately

Reviewed and Tested

92-64           Nozzle Ring Settings           08/28/92        All holders of OLs or CPs

on Low Pressure Water-                         for nuclear power reactors.

Relief Valves

92-63           Cracked Insulators in          08/26/92        All holders of OLs or CPs

ASL Dry Type Transformers                      for nuclear power reactors.

Manufactured by Westing- house Electric Corporation

92-62           Emergency Response             08/24/92        All U.S. Nuclear Regulatory

Information Require-                           Commission licensees.

ments for Radioactive

Material Shipments

92-61           Loss of High Head              08/20/92        All holders of OLs or CPs

Safety Injection                               for nuclear power reactors.

92-60           Valve Stem Failure             08/20/92        All holders of OLs or CPs

Caused by Embrittlement                        for pressurized water

reactors (PWRs).

92-59           Horizontally-Installed         08/18/92        All holders of OLs or CPs

Motor-Operated Gate                            for nuclear power reactors.

Valves

92-58           Uranium Hexafluoride           08/12/92        All Fuel Cycle Licensees.

Cylinders - Deviations

in Coupling Welds

OL  = Operating License

CP = Construction Permit

IN 92-67 September 10, 1992 150 psig to 122 psig, the main feedwater preheater bypass isolation valve may

not close within 10 seconds. If pressure drops to a value as low as 20 psig, it may not be sufficient to close the main feedwater preheater bypass

isolation valve and keep it closed against the maximum differential pressure

across the valve seat.

Upon discovery of this condition, Shearon Harris established a surveillance

interval for verifying that the actuators' components were functioning

properly and that the accumulators were fully pressurized. On January 12,
1992, non-Q components were replaced with suitable components and testing was

completed satisfactorily.

On January 15, 1992, the Shearon Harris Safety Committee determined that the

deficiency in the Hiller actuator for the main feedwater preheater bypass

isolation valves was reportable under 10 CFR Part 21 (Attachment 1), because

of the possibility that these valves might not be able to meet their safety- related function to close within 10 seconds of a feedwater isolation signal

for containment isolation.

Other air-operated valves may be susceptible to similar failure mechanisms.

This information notice requires no specific action or written response. If

you have any questions about the information in this notice, please contact

the technical contact listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

Original Signed by

Charles E. Rossi

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical contact:   Patricia Campbell, NRR

(301) 504-1311 Attachments:
1. Carolina Power and Light Company

Shearon Harris Nuclear Power Plant Part 21
2. List of Recently Issued NRC Information Notices

Document Name: 92-67.IN

* SEE PREVIOUS CONCURRENCES

*C/OGCB:DOEA:NRR

GHMarcus

0("/7/       \08/31/92 OGCB:DOEA:NRR   *EMEB:DET:NRR  *C/EMEB:DET:NRR *D/DET:NRR         *RPB:ADM

NCampbell        PCampbell      JNorberg             JRichardson   TechEd

08/ /92          08/17/92       08/17/92             08/28/92      08/11/92

IN 92-XX

August xx, 1992 150 psig to 122 psig, the main feedwater preheater bypass isolation valve may

not close within 10 seconds. If pressure drops to a value as low as 20 psig, it may not be sufficient to close the main feedwater preheater bypass

isolation valve and keep it closed against the maximum differential pressure

across the valve seat.

Upon discovery of this condition, Shearon Harris initiated a surveillance

interval to verify that the actuators' components were functioning properly

and that the accumulators were fully pressurized. On January 12, 1992, non-Q components were replaced with suitable components and testing completed

satisfactorily.

On January 15, 1992, the Shearon Harris Safety Committee determined that the

deficiency in the Hiller actuator for the main feedwater preheater bypass

isolation valves reportable under 10 CFR Part 21 (Attachment 1), because of

the possibility that these valves might not be able to meet their safety- related function to close within 10 seconds of a feedwater isolation signal

for containment isolation.

Other air-operated valves may be susceptible to similar failure mechanisms.

This information notice requires no specific action or written response. If

you have any questions about the information in this notice, please contact

the technical contact listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical contact:   Patricia Campbell, NRR

(301) 504-1311 Attachments:
1. Carolina Power and Light Company

Shearon Harris Nuclear Power Plant Part 21
2. List of Recently Issued NRC Information Notices

Document Name: LOSSAIR.IN

* SEE PREVIOUS CONCURRENCES

D/DOEA:NRR     C/OGCB:DOEA:NRR

CERossi       GHMarcus

08/ /92, A// 8/ /92 OGCB:DOEA:NRR *EMEB:DET:NRR *C/EMEB:DET:NRR       D/DET:NR~b QRPB:ADM

NCampbell        PCampbell      JNorberg          JRicIrd n TechEd

08/ /92         08/17/92        08/17/92          08/1)X/92     08/11/92
                                                     6,1

IN 92-XX

August xx, 1992 150 psig to 122 psig, the main feedwater preheater bypass isolation valve may

not close within 10 seconds. If pressure drops to a value as low as 20 psig, it may not be sufficient to close the main feedwater preheater bypass

isolation valve and keep it closed against the maximum differential pressure

across the valve seat.

Upon discovery of this condition, Shearon Harris initiated a surveillance

interval to verify that the actuators' components were functioning properly

and that the accumulators were fully pressurized. On January 12, 1992, non-Q components were replaced with suitable components and testing completed

satisfactorily.

On January 15, 1992, the Shearon Harris Safety Committee determined that the

deficiency in the Hiller actuator for the main feedwater preheater bypass

isolation valves was reportable under 10 CFR Part 21 (Attachment 1), because

of the possibility that these valves might not be able to meet their safety- related function to close within 10 seconds of a feedwater isolation signal

for containment isolation.

Other air-operated valves may be susceptible to similar failure mechanisms.

This information notice requires no specific action or written response. If

you have any questions about the information in this notice, please contact

the technical contact listed below or the appropriate Office of Nuclear

Reactor Regulation (NRR) project manager.

Charles E. Rossi, Director

Division of Operational Events Assessment

Office of Nuclear Reactor Regulation

Technical contact:   Patricia Campbell, NRR

(301) 504-1311 Attachments:
1. Carolina Power and Light Company

Shearon Harris Nuclear Power Plant Part 21
2. List of Recently Issued NRC Information Notices

Document Name:  LOSSAIR.IN

*  SEE PREVIOUS CONCURRENCES

D/DOEA:NRR     C/OGCB:DOEA:NRR

CERossi        GHMarcusff

08/ /92        08/.31/926M

OGCB:DOEA:NRR *EMEB:DET:NRR *C/EMEB:DET:NRR *D/DET:NRR          *RPB:ADM

NCampbell        PCampbell       JNorberg         JRichardson    TechEd

08/al/92         08/17/92        08/17/92         08/28/92       08/11/92
     _wF,-tr

The air pump raises the normal instrument air supply pressure from 70 to 100
psig to approximately 150 psig. If accumulator pressure drops from 150 psig

to 122 psig, the valve may not close within 10 seconds. If pressure drops to

a value as low as 20 psig, it may not be sufficient to close the valve and

keep it closed against the maximum differential pressure across the valve

seat.

Upon discovery of the condition on January 7, 1992, Shearon Harris initiated a

surveillance interval to verify that the actuators' components were

functioning properly and that the accumulators were fully pressurized. On

January 12, 1992, non- components were replaced with suitable components and

testing completed sati       c torily.

Other air-operated valves m sbe susceptible to similar failure mechanisms

addressed herein.

This information notice requires no specific action or written response. If

you have any questions about the information in this notice, please contact

the technical contact listed below or the appropriate NRR project manager.

Charles E. Rossi, Director

Division of Operational Events Assessment

===Technical Contact:===

===Patricia Campbell, NRR===
                        (301) 504-ES3&
Attachments:
  1. Carolina Power and Light Company

Shearon Harris Nuclear Power Plant Part 21
2. List of Recently Issued NRC Information Notices

DISTRIBUTION:
Central Files

DOEA R/F

OGCB R/F

N. Campbell R/F

*  SEE PREVIOUS CONCURRENCE

OFFICE:    OGCB:DOEA       *RPB:ADM    EMEB:DET     4B S    ET

NAME:      NCampbell:db TechEd         PCampbell  J     ere

DATE:      08/ /92          08/11/92   08//f/92    08//7/92 OFFICE:     BC:OGCB:DOEA D:DOEA

NAME:      GMarcus         CRossi

DATE:      08/ /92        08/ /92

,qaq42 i.1_     tt

isoVen1                  2 Upon-dlsewery-1/te condition on January 7, 1992, Shearor-Hrr4 initiated a1 surveillance                   to verify that the actuators' components were

ote,'e&V

functioning properly and that the accumulators were fully pressurized. On

January 12,'-H002J non-Q components were replaced with suitable components and

testing completed satisfactorily.

,--t n~       wes-iwUth   er air-operated valves may be susceptible to similar failure

mechanisms addressed herein.

This information notice requires no specific action or written response. If

you have any questions about the information in this notice, please contact

the technical contact listed below or the appropriate NRR project manager.

Charles E. Rossi, Director

Division of Operational Events Assessment

===Technical Contact:===

===Patricia Campbell, NRR===
                                      (301) 504-2836 Attachments:
   1. Carolina Power and Light Company

Shearon Harris Nuclear Power Plant Part 21
   2. List of Recently Issued NRC Information Notices

DISTRIBUTION:
   Central Files

DOEA R/F

OGCB R/F

OFFICE:    OGCB:DOEA               RPB:ADM      EMEB:DET    BC:EMEB:DET

NAME:      NCampbell:db TechEdJM?,' PCampbell              JNorberg

DATE:      08/ /92                08/u /927 08/ /92        08/ /92 OFFICE:    BC:OGCB:DOEA D:DOEA

NAME:      GMarcus                CRossi

DATE:      08/    /92             08/   /92 FILENAME: LOSSAIR.WP}}

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