TITLE:

ES&H Manual

 

DOCUMENT ID:

3210 Appendix T3

Risk Code Assignment

 

 

1.0            Purpose

 

Identification of work hazards and understanding their risks is an essential part of Jefferson Lab’s work process as defined in ES&H Manual Chapter 3210 Appendix T1 Work Planning, Control, and Authorization Procedure.  The purpose of this document is to demonstrate the accepted method for determining the Risk Code for task steps identified while completing Task Hazard Analysis (THA) Worksheet.

 

2.0            Scope

 

This appendix describes the procedure for determining the Risk Code for a task as defined by Jefferson Lab.

 

This document is used in conjunction with ES&H Manual Chapter 3210 Work Planning, Control, and Authorization Process. 

 

3.0            Responsibilities

 

3.1              Task Hazard Analyst (The person performing the Task Hazard Analysis):

·         Use due diligence in the recognition of task steps and possible consequences.

·         Solicit the advice of ES&H professionals and Subject Matter Experts to mitigate and reduce hazards.

 

4.0            Process Steps

 

Jefferson Lab is a low-hazard non-nuclear accelerator facility.  Everyone is expected to use their best professional judgment and experience in estimating the probability of an incident, and obtains advice and information from other laboratory personnel (such as ES&H professionals) whenever the situation is unclear. 

 

4.1              Determining Risk Codes

Identify hazards associated with each task step.  A list of recognized hazard issues relevant to Jefferson Lab activities is listed in ES&H Manual Chapter 2410 Appendix T1 Hazard Issues List.

 

4.1.1        Consequence Level

Using Table 1 (below) determine the consequence of an incident for each task step.  For example:

·         Injury or death?

·         Environmental contamination?

·         Disruption to facility operation?

·         Significant property loss?

 

4.1.1.1        Assign the appropriate Consequence Level to each task step.

 

Table 1: Consequence Levels

Consequence

Level

Severity

Property

Loss

High

(H)

Serious impact on-site.  May cause death or loss of facility operation.  Major impact on the environment.

> $100,000

Medium

(M)

Significant impact on-site.  May cause severe injury, severe occupational illness to personnel, major damage to the facility operation, or impact on the environment. 

> $50,000

Low

(L)

Minor impact on-site.  May cause minor injury, minor occupational illness, or minor impact on the environment.

> $500

Extremely Low

(EL)

Insignificant injury, occupational illness, or impact on the environment.

< $500

Based on the analysis of the Final Safety Assessment Document (FSAD), there are no credible offsite impacts.

 

4.1.2        Probability Level

Using Table 2 (below) determine how often an incident(s) is likely to occur. 

 

4.1.2.1        Assign the appropriate probability level to each task step.

 

Table 2: Probability of Incident

Probability Level

Description*

Estimated Probability of Incident  Occurrence per Year

High

(H)

An incident is likely to occur several times during task.

> 10–1

Medium

(M)

An incident may occur during the task.

10–2 to 10–1

Low

(L)

Probability of an incident occurring is unlikely to happen during the task.

10–4 to 10–2

Extremely Low

(EL)

Probability of an incident occurring is extremely unlikely to happen during the task.

10–6 to 10–4

* Assuming a person performed the task 2000 hours per year.

 

4.2              Determine the Risk Code

Risks associated with an activity are determined by the consequence of an incident and the probability of its occurrence.  These two parameters together determine the Risk Code rating used at Jefferson Lab.  Use Table 3 (below) to assign a Risk Code value to each task step.

 

If there are multiple potential bad outcomes associated with a task, the Risk Code value representing the highest risk outcome is assigned to the task.  If you are uncertain what Risk Code value to assign, assign the higher value.

 

Table 3: Risk Code Assignment

Consequence Level

H

1

3

4

4

 

M

1

2

3

4

 

L

N*

1

2

3

 

EL

N*

N*

1

1

 

 

EL

L

M

H

 

Probability Level

(Estimated likelihood per full-time active person)

 

*Negligible Risk

 

Operations with an initial Risk Code of 3 or 4 require a formal safety work control document per ES&H Manual Chapter 3310 Operational Safety Procedure Program.

 

Table 4: Risk Codes and Task Review Requirements

Risk Code

assigned based on hardware and procedures already in place

Level of Task Review

required before new work can begin

4

High

Formal written and approved procedures in the form of an OSP, or temporary work permit.  Division ESH&Q Officer may require additional approvals.  Generally requires Laboratory Director Approval.

3

Medium

Formal written and approved procedures in the form of an OSP, or temporary work permit

2

Low

None

Workers and supervisors should explicitly review the hazards and mitigating measures.

1

Extremely Low

None

This level of risk is common for appropriately trained personnel.

N

Negligible

None

This level of risk is common, and the relevant measures are addressed as part of general education of the public.

 

5.0            Revision Summary

 

Revision 0.2 – 10/12/12 – Added reference to FSAD.

Revision 0.1 – 06/19/12 – Periodic review. Changed “Accident” to “Incident.” Three year extension granted.

Revision 0 – 10/05/09 – Update to reflect current laboratory operations.

 

 

 

ISSUING AUTHORITY

TECHNICAL POINT-OF-CONTACT

APPROVAL DATE

REVIEW REQUIRED DATE

REV.

 

 

ESH&Q Division

Harry Fanning

10/05/09

06/19/15

0.2

 

This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 7/10/2013.